Screw-lock Biothane® cuffs

Our screw-lock Biothane® cuffs are the perfect addition for someone who wants an always-available restraint to keep them in check, or likes having a reminder of their ownership around their body that they can’t remove without permission. Made of genuine Biothane® strapping, solid ABS clasps and locking with an unusual stainless steel security screw.

We make these cuffs with perma-lock clasps too, but this version is for those who need or want to take their cuffs off occasionally. These screws aren’t ones you’ll usually find bits for in your standard security screw bit case, so we’ll send you a tool for applying and removing your cuffs too! If you later want to wear them permanently, good news! We can make you a pin that replaces the screw to make them permanent!

Compatible with our cute faceplates!

These cuffs are fully waterproof and suitable for everyday wear.

What is Biothane®?

Biothane® is a substitute to leather, commonly used in high-end horse-riding accessories and dog harnesses. It’s extremely strong, tough and durable against the elements, and unlike leather does not soak and degrade in water after a long time. It’s available in dozens of colours, from dark leather-like browns to vibrant neons, so we’ll probably have a shade you like the look of.

Getting your measurements

To measure your cuffs, you’ll need a simple tape measure. We take measurements in centimetres (cm). Place the tape measure on your wrist or ankle where you’d like to wear your cuff and hold it gently against the skin, overlapping the ends and make a note of the circumference. For comfort, we recommend wearing your cuffs slightly closer to your torso than your wrist or ankle bones. We’ll add a few millimetres to your measurements for comfort. Unless you want a particularly tight cuff, which we don’t recommend for permanent cuffs, don’t pull the tape measure tight when measuring. We also recommend making sure both your wrists/ankles are the same size, just in case! If they’re not, let us know in the special requests section and tell us your measurements for each limb.

If you’d like particularly loose cuffs, let us know and we’ll happily oblige! Keep in mind that this is very easy to achieve with ankle cuffs, but for wrist cuffs, you may be able to slip out if they’re too loose. To test this, pinch your tape measure at the dimensions you’d like your cuffs to be and see if you can pull it over your wrist and hand. If you can, or nearly can, consider going a bit tighter.

Keep in mind that adding D-rings to your cuffs adds a bit of necessary circumference and your cuffs will feel slightly looser with D-rings removed. We make all cuffs ready for D-rings so you can add them in future comfortably.

D-rings

By default, our cuffs are a simple, interlocking clasp and an unbroken Biothane® band, resulting in a beautiful clean aesthetic. You can easily be restrained using these designs, but for quick lock-ups and broad compatibility with other restraints and locks, we offer these cuffs with D-rings, to add flexibility to your new accessories. We can supply D-rings in either 304 alloy stainless steel, or in nylon plastic. If you want to take your cuffs through airport security without explaining yourself, we recommend plastic, but stainless steel are stronger. Keep in mind that this unlockable version uses a brass lock, which may set off metal detectors. However, if you can get an all-plastic chastity cage that uses one of these locks through airport security, you’ll be fine!

Taking care of your cuffs

Our cuffs are fully waterproof and will not rust or tarnish in freshwater or saltwater. We use Biothane® and stainless steel eyelets for the main cuff bands, and ABS plastic for the locking clasps. If your cuffs get dirty, you can clean them with any body-safe soap and water, and you can safely wear them in the bath or shower and while swimming in chlorine. Biothane® is highly resistant against UV damage, but if you’re storing them for a long time, please put them somewhere out of direct sunlight. Both parts of our cuffs are damaged by certain solvents, particularly acetone, used in nail polish remover. If you do spill exotic substances on your cuffs, just wash them off with water.

We use brass threads to catch the screws, which may slightly tarnish after a long time in saltwater, so if you’re spending days at sea, just have a shower afterwards. Our screws are made from 304 alloy stainless steel, and are impervious to basically everything safe to touch your skin.

These cuffs are designed for everyday comfort, to be a reminder of your place and to be a statement piece. You can effectively use them as restraints, but they’re not suitable for extreme weight-bearing such as suspension. Please experiment with your cuffs before fucking them up. Our clasps are designed to break at the clasp under extreme stress, and the Biothane® band will not usually be damaged.

We’re pretty new to this, and we want to improve our cuffs as we go, so if your cuffs fail within the first year outside of rough play, please let us know – we’ll send you some free clasps if you let us know how it failed and sent us photos.

Picking your band colour

The colour options listed here on this page show the colours as advertised by our main supplier. If you would like to see how a certain colour looks in particular lighting etc, please get in touch! Certain colours also fluoresce (appear to glow brightly) under deep blue and ultraviolet (UV/blacklight) light, including all neon options, and a few others. If you’d like to know whether a certain colour is fluorescent, get in touch!

Custom colours

We can provide our cuffs in any colour we can get our hands on. For our main bands, we offer dozens of colours, and if you find another colour you like more that’s available in 19mm Biothane® BETA, we’ll source it for you if we can. We make our locking clasps from printed ABS plastic that’s then surface treated. We’ll happily manufacture your clasps in any colours we can source, and can also optionally apply body-safe finishes such as ceramic coatings and paints/clear-coats. If you would like surface finishes added to your cuffs, please contact us before ordering as we’ll have some material science to do in the paint shop.

Further customisation

If you would like painted text on your cuffs, please add a custom request to your order. We are able to stencil most text in most fonts, and most icons subject to minimum sizes. We then protect the painted details with a leather paint finishing product. Keep in mind that Biothane®, like leather, is a textured surface and although we take great care to keep lines clean, we can’t guarantee results that look like exactly like machine printing, and all painted pieces are hand-made with made-to-order stencils. We can paint lettering and icons in any colour and mix colours to achieve a perfect tone if you wish. The paints we use dry flexible and are designed for leather and Biothane®, and can be submerged and washed like the rest of the cuff.

If you want something customised beyond the options we offer here, please get in touch!

Shipping

For customers in the UK, we ship all orders using Royal Mail, with the option for fully tracked services. For international customers, we use international couriers to protect your purchase in transit.

Manufacturing time

We expect to ship cuffs at most 4 weeks after you place your order, but possibly much faster. We’re just getting started with production, so we’ll update this estimate with a more accurate time when we have more orders under our belt. Certain colours of Biothane® which are either in very high or low demand, or colours you’re the first to request, may need to be ordered to fulfil your order, but we place materials orders regularly and materials usually get to us within a week at the most. If we’re waiting for materials for your cuffs, we’ll send you an email. If you request a customised item, materials and tools may take longer to get to us, but we’ll update you personally if this is the case.

Legal notice

Designs for the locking clasps may change slightly between the photos shown and manufacture due to improvements in design. These products are sold as toys suitable for adults only, and should not be used without appropriate experience. They should not be used as part of life-saving equipment and are not certified or approved for any kind of medical use. They are sold for novelty and entertainment purposes only.