Features: This vise is made of brass and aluminum alloy. The diameter is 20mm/ 0.79inches or 19mm/0.75inches Stainless steel wear resistance, high temperature resistance, long service life. Working range 152.5mm Consist of M12 120mm stainless steel rod, brass stop, 70 x 20mm(H x D) stainless steel spindle and 8mm ratchet screw clamp As for screwing a wooden fiting that allows for clamping objects of any shape(round,oval,frame corners, etc..) s: Woodworking Adjustable Holder With Quick Clamping Tenon Stop For Desktop Woodbench Fixed Locking Accessories Woodworking Tools This tool is perfect for clamping irregularly shaped objects, consisted of adjustable holder with a quick screw ratchet clamp, it is characterized by high clamping force achieved by the quick clamping mechanism. Color: Red & Silver Material: alloy Package Contents: 2 x vise 4screwing a wooden fiting 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.