Ice Lock for Self Bondage Color:Gray Inner diameter of tube is

Inner diameter of tube is 50mm

and 3" not shown in picture

make sure that the zipper is all the way down

creating a very refined look

The screw eye version is meant to be more permanent and is best used if you wish to drill into the bed frame

Ice Lock for Self Bondage Color:Gray Inner diameter of tube isThis is a great item to add to your self bondage tool box. Fill the round tube with water and insert the plastic key. Place the entire assembly in the freezer until the water has turned to ice inside. Attach a set of keys to the round loop portion of the ice lock and suspend it by the diamond shaped part out of reach of questing fingers. Once the ice melts, the lock portion with the keys will fall and can then be retrieved. Total melt time is usually