Martin cuffs share the following basic design features: The shackle profile is shaped so that it is impossible for a prisoner locked in these cuffs to rotate his wrists.

If the cuffs are applied with the keyholes facing away from the hands, it is highly improbable that one could open the cuffs on his own, even if in possession of a key.

This version of the Rigid Cuff has a longer span between the two cuffs. The length of this span was designed to prevent the wearers hands from reaching each other.

There is a slot cut into the middle of the cuff case allowing a chain link or padlock to pass through to further secure the cuffs (E.g. to a belly chain.)

Another version of the basic model . With bent middle-part .

The 8 for feet in a very secure design with special keys (don't lose them or you are into trouble)

The 8 for feet in a very secure design with special keys (don't lose them or you are into trouble)

The Rigid Cuffs 8 for ankles is a very secure design. (don't lose them or you are into trouble). An "X" cross-hole allows a chain to be passed completely through the cuff. Two steel pins can then be activated inside the cuffs which holds the chain in one position. The pins can only be activated or released when the cuffs are open. The two pins allow two separate chains to be connected at each end of the cross-hole, or one continuous chain passing through the cuff can also be used.

Due to the extra space required for the "X" cross hole and locking cylinders, two versions of the cuffs have been designed which accommodate larger and smaller ankle sizes. See divisions and photos below. Notice that the locking cylinder is smaller on the cuff designed for smaller ankles.

The 8 for hands in avery secure design with special keys (don't lose them or you are into trouble)

The model shown is the version for the hands . The rotating rings are available in different dimensions: See sizes for hands on the RigidStock TL.

The model shown is the version for the ankles.

The model shown is the version for the wrists.

Handcuffs

Handcuffs

'LegIrons' for use around the ankles.

These cuffs are extra heavy-duty with four stainless steel chains

These unique cuffs have four stainless steel chains

These unique cuffs have nine stainless steel chains.

These unique cuffs have nine stainless steel chains.

These unique cuffs will allow up to 12 chains to be attached to each cuff.

Handcuffs

Model Z, made in 6 layers of aluminum a 8 mm, so it is about 48 mm thick