Swivel for Bench Vice with Desk Clamp

Two types of add-on swivels for my bench vice with desk clamp. Version ‘B' is a simple bayonet that allows easy removal of the vice from the desk clamp so it can be moved around. the ’A' version is also removable, but is pinned in place and has a rotational lock. both versions are attached using ½ long 8-32 screws (flat or pan head as the countersinks are pretty deep) The ‘A' version requires two 1.5 inch long 10-24 (or32) screws, one for the locking “pin” on the vice side of the swivel and one on the clamp side of the swivel to act as the rotational lock. The lock works by pushing a conical plunger into the swivel post.