1. Material: stainless steel/aluminum alloy
2. Metal material, wear-resistant and durable, anti-rust and anti-corrosion
3. Square clamping pad design, firmly clamping
4. Table stopper for clamping and fixing boards, convenient and practical
5. 19 / 20mm diameter optional, adapt to different woodworking table holes
6. Weight: stainless steel model about 100g, aluminum alloy model about 31g
7. Size: 19mm about 35 x 28 x 19mm, 20mm about 35 x 28 x 20mm