Vicmarc Dual Screw Type Faceplate.
You can use either side of this part by removing the screw and reversing the face plate.
Small dovetail side can be used with VM90/100 Standard Jaws (expansion mode) or the VM90/100 2 Step Dovetail Jaws (clamp mode).
Larger Dovetail Side can be used with VM120/150 Standard Jaws (expansion mode) or VM90/100 100mm Dovetail Jaws (clamp mode).