DescriptionThis item is manufactured with premium material for durable and long-lasting use. It fits for drill size of 3-10mm. It's designed mainly for fixing the drill bit, limited the depth of drill holes and make depth of the hole consistent. It's more convenient to round wood mortise of use.Features- Color: Silver.- Material: Stainless steel.- Size: 1.70X1.00X0.80cm/0.67X0.39X0.31 inch.- Specification: 3, 4, 5, 6, 7, 8, 9, 10mm.- The drilling limit ring is made of premium stainless steel, anti-corrosion, durable and long lasting.- Can quickly and easily help you drill holes to exact depths and are great for production work and repeated drilling by positively locking anywhere along the bit.- Bit limit rings are used as a shaft collar on machinery and can be used on twists drill bits or brad point drills or any type of bit to prevent excessive drill bit penetration and for any jobs that uses a bit and needs precision.- The depth stop collar fits for high carbon steel drills, and positively locks anywhere along the bit. As drill Limited ring, clamping device, positioner.- The drill depth stop can be fixed on the drill bit to limit the depth of the drilling hole to ensure the same drilling depth.Packing list; 8 x Drill Bit Collars