Features: brand new and high quality. Both T-Screw and Screw are of 8mm threaded. Material: Aluminum Alloy. Put clamping pressure anywhere along the flush-mounted T-Slot T-Track. Slides into T-Track & quickly secures with the turn of the hand knob. T-track hold down clamp is an for ideal choice for clamping jigs & fixtures. This is for a set of new hold down clamps for use with t-slot track. Great for use with routers, drill presses, CNC, table saws, jigs, panels, vertical mills and more. Specifications: Material: Aluminum Alloy Size: As the Picture Show Main Body Clamp: approx 160x30mm/6.30X1.18 inches M8 Screw: approx 100x8mm/3.94x0.31 inches M8 for T Screw: approx 100x22.5x12.6mm/3.94x0.89x0.50 inches Color: Blue/Red Package Includes: 1x Woodworking T-Track Hold Down Clamp note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.