This is for a set of hold down clamp to be used with the T-slot rail, Only contains one M8 plastic handle and one M8*100mm trunking T screw These clamps are useful in many woodworking and metalworking applications for holding, positioning and securing work Puts clamping pressure anywhere along the recessed T-slot Slides into the T-track and quickly attaches by turning the hand knob nut T-screw and threaded rod are 8mm threaded Features: This is for a set of hold down clamp for use with the T-slot track. These clamps are useful in many woodworking applications for woodworking, positioning and securing. Puts clamping pressure anywhere along the recessed T-slot T-track. Slides into T-track Quickly secures by turning manual knob nut. T-screw and threaded rod are 8mm threaded. Very versatile! Also great for clamping jig fixtures Specifications: Main Material: Metal Main Color: Silver Thread: M8