Adjustable clamping pressure: 3 pressure levels available, high, medium and low. Different clamping forces are suitable for pressing materials and a variety of use scenarios. What you get: The clamp is made of quality aluminum alloy and stainless steel; Workmanship, very well and carefully processed. EASY TO USE - Drill a 20mm/19mm vertical hole on the top of your workbench to accommodate the fastener and put it in place, adjust the clamping pressure until it is firmly stuck in the hole to hold your work firmly, then you can start your work. Applications: for applications where you need to constantly change the workpiece; Carving, milling, sanding, finishing and general woodworking work; The rough shank and unique hook-shaped profile offer a strong hold on difficult workpieces, Manufacturer: Bumdenuu