This is for a set of hold down clamp for use with the T-slot rail. These clamps are useful in many woodworking and metalworking applications for holding, positioning and securing work. Exerts clamping pressure anywhere along the recessed T-track. Slides into the T-track and quickly attaches by turning the pommel nut. T-screw and threaded rod have an 8mm thread. Very versatile! Also ideal for fixtures and fixings. Features: This is for a set of hold down clamp for use with the T-slot track These clamps are useful in many woodworking and metalworking applications for holding, positioning and work securing Exerts clamping pressure anywhere along recessed T-track Slides into T-track and quickly attaches by turning the pommel nut The T-screw and the threaded rod have an 8 mm thread. Very versatile! Also ideal for fixtures and fixings Features: Main Material: Metal Main Color: Silver Thread Size: M8 LRFR is committed to providing each customer with the highest standard of customer service.