These clamps are made by alloy steel and have two functions the Pocket-hole clamp and
Face clamp. The max hole clamping size reaches 4” width. There are two small screws on the clamp which used to fix the pin. The Pocket-hole clamp can be changed into Face clamp when you turn out small screws then turn the pin 180 degrees and once more turn in the two small screws. The unique construction of the clamp has double value of use.