This is a framing holder designed for Stier parallel clamps.

You can use 4 or more of these holders to apply precise force to furniture bodys in a 90° angle.

You can attach them on your workbench either by screwing them with 5mm panhead screws or by inserting a table clamp with 8mm bolt into the base of the holder (e.g. Bessey TK 6).

Of course you can also use them freely lying on the table. In this case I woud recommend glueing some foam rubber on the bottom.

As most of the parallel clamps on the market have very similar dimensions as the Stier parallel clamps, it should also fit to many others like Bessey REVO KRE(V), sauter HE-PC etc.