What you receive: the clamp is made of quality aluminum alloy and stainless steel; Perfect workmanship,very well and neatly processed. Adjustable Clamping Pressure: 3 pressure level available, high, medium and low. Different clamping force is suitable for a various pressing materials, a variety of use scenarios. Easy to Use: Drill a vertical 20mm/19MM hole in your workbench top to accommodate the holdfast and drop it in place, adjust the clamping pressure until it jams tightly in the hole to hold your work firmly, then you can start your work. Various Applications: For applications where you need to consistently shift your workpiece; Carving, routing, sanding, finishing, and general woodworking jobs; Rough stem and uniquely hooked profile offers a on difficult workpieces Colour:Black Material:Aluminum Stainless Steel Size:19MM Package Contents: 1x Woodworking Desktop Quick Acting Hold Down Clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.