HiSmith Sex Machine Anal Attachments Australia: Best KlicLok Picks and Setup Guide

HiSmith makes four KlicLok attachments sold for anal use: the 7.5in Slim Silicone, the 7in Veined Slim Silicone, the 8.2in Smooth Aluminium Beaded and the 8.5in Black Silicone. The narrowest of them is 3.2 cm across. None of them is a beginner size. If anal play is new to you, start with a flared-base plug and leave the machine out of it for now.

Who this guide is for

You already own a HiSmith machine, or you are close to buying one, and you want to use it anally. You are trying to work out which KlicLok attachment to click on, how deep the thing actually thrusts, and what will hurt you if you get it wrong. This guide answers those three questions with figures taken from the product pages, not from a category average.

The four HiSmith KlicLok anal attachments

HiSmith's catalogue contains four distinct KlicLok attachments sold for anal use. Every figure below comes from the product page for that attachment.

7.5in Slim Silicone: the pick of the four

The 7.5in Slim Silicone Anal Dildo is the most forgiving attachment in HiSmith's anal range, and the only one with a real base. It is 3.8 cm in diameter with 16 cm of insertable length out of 19 cm total, which means roughly 3 cm of the toy is base rather than shaft. The KlicLok plug pulls out, and with the plug removed HiSmith lists it as harness compatible, so it works for pegging as well as machine use.

7in Veined Slim Silicone: more texture, almost no base

The 7in Veined Slim is a fraction wider than the 7.5in at 4 cm in diameter, and it is the one with the raised veining. The catch is the geometry: HiSmith lists 17.2 cm insertable out of 17.8 cm total, so there is only about 6 mm of the toy that is not shaft. On the machine that is irrelevant, because the KlicLok connector holds it. Off the machine it is a problem, and the section on safety below explains why.

8.2in Smooth Aluminium Beaded: narrow, but the least forgiving

This one is counterintuitive. At 3.2 cm across at its widest point, the aluminium beaded dildo is actually the narrowest attachment in the anal range, narrower than either silicone slim. It is still the hardest to use safely. It is rigid aluminium alloy with no give at all, HiSmith lists the total and insertable length as the same figure of 20.8 cm, and the graduated beads mean the diameter changes as it moves. Rigid plus long plus zero flex is a combination that punishes a bad angle. It suits people who already run metal toys manually and know how to position for them. HiSmith says it is waterproof, anti-rust and compatible with any personal lubricant.

8.5in Black Silicone: the one most people should skip

The 8.5in Black Silicone is the loser of this comparison for anyone who is not already very experienced. HiSmith describes it as built for experienced users, and the numbers back that up: 5.2 cm at the mid-shaft bulge, 4.6 cm near the tip, 17.8 cm insertable out of 21.6 cm total, with sculpted knots along the shaft. That mid-shaft bulge is more than double the 2.5 cm beginner guidance. There is no reason to reach for this attachment before you have spent real time with the slimmer two.

You can see the whole KlicLok add-on range in Sex Machine Accessories, and the machines themselves in HiSmith Machines and Accessories.

Why none of these is a beginner size

Nothing in HiSmith's KlicLok anal range is a beginner size. The widely used starting diameter for anal plugs is 2.5 cm or less. The narrowest HiSmith anal attachment is 3.2 cm at its widest point, and the two silicone slims are 3.8 cm and 4 cm. HiSmith's own product copy calls the slim models beginner-appropriate. On diameter alone, they are not.

That is not a reason to avoid the range. It is a reason to arrive at it in the right order. If you have not done anal play before, the sensible sequence is a flared-base plug at 2.5 cm or under, then manual toys, then a machine. Machine-assisted anal play removes your ability to back off instinctively, which is exactly the reflex that keeps a beginner safe. Start with the Butt Plugs range and read the beginner butt plug sizing guide before you spend money on an attachment you cannot use yet.

What KlicLok is, and what it is not

KlicLok is HiSmith's own patented quick-release attachment mount. It is not a brand, not a company and not a rival to HiSmith. It is an eight-sided click connector: you push the attachment on, it locks, you press the release and it comes off. There are no third-party KlicLok attachments. Non-KlicLok toys reach a HiSmith machine only through a HiSmith adapter.

The eight-sided geometry matters for anal use specifically. Round connectors let an attachment spin under load. The KlicLok connector does not, so the toy holds the angle you set it at instead of rotating mid-stroke. That is the whole safety argument for the system: mechanical retention rather than friction or an improvised mount.

One accessory that gets misread constantly: the KlicLok Suction Cup Adaptor is not a mount for the machine and is not load-bearing. It is an adapter that lets a suction-cup dildo with a base of 11.3 cm or under click onto the machine's thrust rod. It does not anchor the machine to anything. If you want the full attachment picture, the KlicLok attachment guide covers the whole system.

Stroke depth: the number that actually matters

Stroke depth and toy length are two different measurements, and confusing them is how people get hurt. Toy length tells you the maximum insertable length available. Stroke length tells you how far the machine drives the toy back and forth on every cycle. You set the stroke; the machine then repeats it, without fatigue, for as long as it is switched on.

Read those maximums again, because they are the whole point of this section. A HiSmith Premium set to its longest stroke drives the attachment 15 cm in and out on every cycle. A Servok Premium goes to 17 cm. Those are the real ceilings, and they are roughly the full depth of the rectum. Anyone who sets a machine believing the ceiling is 7 cm has misunderstood the machine by more than half.

The Servok's headline 600 strokes per minute is also easy to misread. HiSmith publishes that figure for the minimum stroke setting, where the machine behaves more like a high-frequency vibrator than a thrusting machine. At the maximum stroke setting the same machine tops out at 120 strokes per minute. Speed and depth trade against each other; you do not get both at once. The Servok Premium review goes into that trade-off in detail.

For anal use, the practical answer is that you will spend most of your time nowhere near either ceiling. Set the shortest stroke the machine offers, run it, and increase in small increments only if you want to.

Setting the machine up for anal play

Set the depth with the machine off

HiSmith's own care instructions for the anal attachments are explicit: never adjust thrust depth while the machine is running, and make sure the depth knob is fully tightened before you start it. A knob that works loose under load lets the stroke drift longer than you set it. Set it cold, tighten it, then check it has not moved before every session.

Get the angle right before the motor goes on

The rectum is not a straight tube. It curves, and a machine driving a rigid toy along a straight line into a curve is a straight line into pain. Position yourself so the thrust axis follows the curve rather than fighting it. Lying on your back with your hips raised on a cushion, or on all fours with the machine behind you, are the two positions that make this easiest. Adjust the arm angle before you switch anything on, then check it again at the lowest speed and shortest stroke.

Speed and stroke settings

Start at the lowest speed and the shortest stroke your machine offers, every time, including sessions where you have done this before. On a HiSmith Premium the lowest stroke setting is 3 cm; on a Servok it is 1.7 cm. Increase one variable at a time. A machine will hold whatever setting you land on indefinitely, and that is exactly the property that makes an over-ambitious setting dangerous rather than merely uncomfortable.

Anal safety with a machine: the non-negotiables

None of this is optional, and none of it is squeamishness.

• A flared base is mandatory for any use off the machine. Anything without one can be drawn into the rectum, and getting it out is a surgical procedure under anaesthetic. On the machine the KlicLok connector retains the toy. Off the machine, the connector is gone and the base is all you have. The 7in Veined Slim has roughly 6 mm of non-insertable base, and the 8.2in Aluminium Beaded is 20.8 cm of solid metal with no flared base at all. Do not use either of them anally without the machine holding them.
• The rectum does not self-lubricate. Unlike vaginal tissue, it produces nothing. Lube is mandatory, you need more than you think, and you need to reapply during the session. Friction with a machine driving it is not the same as friction by hand.
• No numbing or desensitising products. Not lubes, not sprays, not creams. Pain is the warning system that stops you tearing tissue. Numbing does not raise what a body can take; it removes the signal telling you that you have already exceeded it.
• Stop on sharp pain. Bleeding means stop and seek medical care. A small amount of discomfort as you relax is one thing. Sharp pain is your body telling you to stop, and blood is not something to work through.
• Never go anal to vaginal without washing the toy properly or changing the condom on it. This one causes infections routinely and is entirely preventable.
• Start smaller than you think. Beginner plug diameter is 2.5 cm or less. Nothing in HiSmith's anal range is that size, which is why the first purchase for a first-timer is a plug, not an attachment.
• Douching, if you do it, is warm water only. No soap, and do not over-douche. Repeated douching strips the mucosal lining you are relying on.
• Set stroke depth with the machine off and the knob tightened. Start at the shortest stroke. The Premium's real maximum is 15 cm and the Servok's is 17 cm, so a mis-set knob has a long way to go.
• The KlicLok Suction Cup Adaptor is not load-bearing. It is not a mount, it does not anchor the machine, and it is not rated to take your weight. Do not treat it as a fixing point.

Lube, cleaning and materials

Water-based lubricant only with the silicone attachments. Silicone lube degrades silicone toys, which is a material fact rather than a preference, and it is the single most common way people ruin an expensive attachment. HiSmith's product page for the aluminium beaded dildo states it is compatible with any personal lubricant, which is the one exception in this range.

All four attachments are non-porous, which makes cleaning straightforward. Wash before and after every use with warm water and a dedicated toy cleaner, and dry fully before storage. HiSmith notes that the aluminium beaded dildo should not be cleaned with abrasive cleaners, which dull the polished finish. Do not store silicone toys touching PVC toys; the two materials react and both get damaged.

Stock up on water-based lube from the Lubricants and Lotions range, and if you want the wider context on materials and anal toy selection, the anal toys guide and the prostate massager guide both cover it.

Why buy from Pleasing Strings

We stock the HiSmith range from warehouses in Brisbane and Melbourne, and orders placed before 10am dispatch the same day. Shipping is free over $99. Every parcel goes out in plain, unbranded packaging, and the billing descriptor on your statement is discreet. Machines carry a one-year warranty, which sits on top of your rights under Australian Consumer Law rather than replacing them.

Related guides

• HiSmith Sex Machine for Anal Play: Best Attachments, Settings and Positions
• HiSmith Sex Machines: Complete Buyer's Guide (All Models Compared)
• HiSmith Sex Machine Accessories: The Complete Guide to Expanding Your Setup

Further reading: Big Dildo Buyers Guide: Biggest Realistic, Girthy and Fantasy Options, for sizing on the larger end of the range. HiSmith KlicLok Attachments for Men covers the stroker and sleeve side of the system, and HiSmith Sex Machine for Couples covers partnered setups.

Last updated: 13 July 2026