Features This is for a set of hold down clamp for use with T-slot track These clamps are useful in many woodworking & metalworking applications for work holding, positioning, and fixturing Puts clamping pressure anywhere along the flush-mounted T-slot T-track Slides into T-track & quickly secures with the turn of the hand knob nut Both T-screw and threaded rod are of 8mm threaded Features: This is for a set of hold down clamp for use with T-slot track. These clamps are useful in many woodworking & metalworking applications for work holding, positioning, and fixturing. Puts clamping pressure anywhere along the flush-mounted T-slot T-track. Slides into T-track & quickly secures with the turn of the hand knob nut. Both T-screw and threaded rod are of 8mm threaded. Very versatile! Also perfect for clamping jigs & fixtures! Specifications: Main Material: Metal Main Color: Silver Thread 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) OR 1 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