Hand Knob, Handle Type 4 Point, Handle Material Plastic, Mounting Type Hex Hole for Bolts/Cap Screws/Nuts, Thread Size M12, Handle Dia. 2-1/2 in, Base Dia. 63/64 in, Overall Height 1.13 in, Inside Dia. 12.00mm, Tap Type Through Hole, Color Black, Features For Applications where the Knob must be Completely Removed after the Releasing Operation and Refitted Very Rapidly for Re-Clamping, Seal Material Not Applicable, Finish Matte