HHIP 9/16" universal adjustable clamp set with brass plate (Fits 5/8" T-Slot). Supplied in pairs. One piece forged steel heads, fully heat treated. Self-positioning. Instant height adjustment. One piece forged steel heads that are fully heat treated. Allows quick set-up on mill table with T-slot. Hinged brass swivel rocker protecting workpiece. Clamp is 1.95" wide x 5.5" long. Clamping range is up to 3.5". Stud thread is 1/2"-13. T-slot width is 0.62".