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 ideal for clamping jigs fixtures! Specifications: Main Material: Metal Main Color: Silver Thread Size: M8 Package Includes: 1 x Clamp Bracket 1 x M8 Star Knob 1 x M8 x 100mm Threaded Rod 1 x M8 T-Nut 1 x M8 x 100mm T-Bolt 1 x M8 Washer Quantity: 1 set Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thanks!