Features Applications: This is for a set of hold down clamp for use with T-slot track. Very versatile! Also perfect for clamping jigs & fixtures Woodworking and Metalworking applications: These clamps are useful in many woodworking & metalworking applications for work holding, positioning, and fixturing Flush-mounted T-slot T-track: Puts clamping pressure anywhere along the flush-mounted T-slot T-track Hand knob nut: Slides into T-track & quickly secures with the turn of the hand knob nut 8mm threaded: Both T-screw and threaded rod are of 8mm threaded Specifications:Main Material: MetalMain Color: SilverThread Size: M8 M8 Plastic Handle Size: Height Approx. 26mm / 1in,Shape: Approx. 46.5mm / 1.8inChute T Screw Size: M8 Male Long Approx. 100mm / 3.9inT Hat Size: Approx. 12.6 x 22.5 x 3mm / 0.5 x 0.9 x 0.1in Package Includes:1 x Whole Clamps Set (Threaded Rod, T Screw, Knob Nut, Slide Block, Washer, Clamp Board)OR1 x T Screw and Plastic Knob Nut  Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List