Drill Stop Rings Kit, 8PCS Limit Ring Dowel Depth Stop Carbon Steel Bits Depth Ring Positioner Stop Depth Drill Collar Stop Rings with Hex Wrench for Drill Bits Consistent Drilling

Carbon steel: The drill depth stop made of carbon steel, sturdy and durable. Accurate depth for drilling work: Mainly use to set the boundary depth on the drill. Carefully check the depth of the drill hole you drill. Methods of use: Select the appropriate drill size and stop the collar, slide the collar over the drill and adjust the desired depth with a ruler or depth gauge. Then tighten the collar on the drill. Diamond: Available in four sizes: 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 0 mm, 12 mm.