T-Track Size: 3” Length X 3/4” Width X 3/8” Depth Material: 6063 aluminum alloy, Fine sandblast anodized with silver color Includes: 4 PK 3 inch T-Tracks and 8 pcs wood screws T-Track Fits: 5/16” t-bolts and Hold-Down Clamp 6-3/8” L X 1-1/4” W or 5-1/2” L x 1-1/8” or 3-5/8" L x 3/4" W Versatile Use: Perfect for Workholding and Fixturing in Woodworking Applications Including Router Tables,Drill Presses,CNC Machines,and Table Saws Our t-tracks and accessories features: smooth and durable, easy to install and use, and versatile. After using Our t-tracks and accessories. You can add the number of workbench configurations as you want. Those can be optimizing your fixture table and workroom. The t-tracks and accessories is made of 6063 aluminum alloy. T track were pre-drilled mounting holes. For our t track, track kit and track clamps, T-bolts ect. can well work together Our t-tracks and accessories can be used for many in many scenes and workbenches and machine: it can work together when holding, positioning, and fixturing in woodworking & metalworking. It can well work together with many machines : workbenches, jigs, cnc etc