These clamps are useful in many woodworking & metalworking applications for work holding, positioning, and fixturing - Adopt the smooth corners to get rid of hurting hands.- Rubber grid mat. Specifications: Main Material: Metal Main Color: Silver Thread Size: M8 Package Includes: 1 x Whole Clamps Set (Threaded Rod, T Screw, Knob Nut, Slide Block, Washer, Clamp Board)OR 1 x T Screw and Plastic Knob Nut Only Specifications: Main Material: Metal Main Color: Silver Thread Size: M8 M8 Plastic Handle Size: Height Approx. Both T-screw and threaded rod are of 8mm threaded Package Included:1 x KnuckleClampMore Details: SKU : 1429379Weight : 320 g T Track Clamp Platen Set (2 Sets) Metal Quick Acting Hold Down Clamp Set for T-Slot T-Track Woodworking Tool · Alloy Steel · 4.84.8 out of 5 stars (6) · £24.75... T-Track Hold-Down Clamp T-Slot Press Clamp Aluminum Alloy Quick Acting Hold Down Clamp For Woodworking On Hold Meaning Cvs at Terri Kent blog Metal Quick Acting Hold Down Clamp Set Woodworking Tool For T Slot T Track (A Set Of Pressure Plates), Horizontal Holdown Clamps - Canada Both T-screw and threaded rod are of 8mm threaded. Very versatile! Also perfect for clamping jigs & fixtures!