These T-slot clamps are universal sizes and fit most T-tracks that accept standard 8mm bolt heads. High QualityThe quick action hold down clamp are made of high quality metal, strong and durable, not easy to bend; the triangular nut interior is made of brass and the outer shell is made of high quality polypropylene plastic, light but hard, not easy to break when tightened. Useful HardwareThis is a set of T-shaped clamping clamps, which is suitable for use with T-shaped guide rails or T-shaped grooves. It has a high tension clamping effect to meet your firm and reliable construction needs. Application Range These hold down clamps are ideal for holding, positioning and fixing wood or metal work such as routers, drill presses, CNC, table saws, jigs, panels, vertical milling machines and more. Quick Installation Slide the bolt head into the T-slot and tighten the triangular nut up and down until it is tight to complete the fixation. The operation is simple and quick, saving time and effort. Product size: 100*42mm Product color: black Delivery quantity: One piece