Ramp-up your benches, jigs, and machine tables with this versatile track! It accepts 5/16'' T-bolts, 1/4'' T-bolts and 1/4'' Hex-bolts, so you can attach virtually any accessory. Choose from 2 ft, 3 ft, or 4 ft lengths. 3/4'' Wide x 3/8'' Deep. Pre-drilled mounting holes in base 4'' on center, 2'' from each end. Mounting screws not included.