Our stainless steel strap-on attachment is specifically designed for the locked wearer of a Behind Barz Chastity Belt.  The strap-on attachment is placed behind the central fitting nut; it is easily mounted or removed and does not require unlocking the belt.  Perfectly positioned meaning he can remain locked up, chaste and frustrated while he serves you with your favourite dildo! The detachable steel O ring comes in a variety of sizes starting from an inside diameter of 35mm ranging up to 60mm and will accept most dildos especially those with a flared base. when ordering please use the free text box provided to specify the size O ring you require.