INCLUDES: (2) Hold Down Clamps for T-tracks/T-slots; (2) 5/16-Inch-18 thread 3-1/2-Inch long T bolts; (2) Washers; (2) 5/16-Inch-18 thread 5-star knobs FUNCTION: Provides exceptional clamping action for your universal t-track system configurations and assemblies FEATURES: Ergonomically designed 5 star knobs, non-marring clamping pads, and a high tension clamping capacity DESIGN: Made from premium grade anodized aluminum with a lever shaped profile ensuring optimal leverage in addition to work piece accessibility VERSATILITY: Hold Down Clamp Set is ideal for work holding, positioning, and fixturing for many woodworking or metalworking applications, including routers, drill presses, CNC, table saws, jigs, panels, vertical mills and more PLEASE NOTE: Our t-bolts, both 1/4"-20 and 5/16"- 18 have a head size of 17/32" wide x 13/16" long and 7/64" thick (Please see drawing). They are designed to fit Universal T-track or larger and will not fit 1/4" or Mini T-track. Please check the size to verify that they will work for your application., Weight: 0.66 pounds, Manufacturer: POWERTEC