1Piece Drill Bit Hole Depth Split Ring Screw Stop Collar Set 12/10mm - as described 28x11mm

Description: Provides secure dependable grip around the diameter of your drill bit. Delivers quick and easy utility. Will not mar your drill bits because the collar screw never touches the bit itself. Used to accurately control the depth of the hole you are drilling. Hold securely in place where you put them. Specification: Material: Aluminum Color: Black Size: 12 x 28 x 11 mm / 0.47 x 1.1 x 0.43 inch; 10 x 24 x 9 mm / 0.39 x 0.94 x 0.35 inch Screw Hole: M3 Package Includes: 1 Piece Split Ring Stop Collar