High Quality MaterialThe drill depth stopper is made of quality 304 stainless steel and is very strong and durable, with high hardness, not easy to wear and deform, corrosion resistance, good heat resistance and long service life.Full SpecificationsThere are eight different sized drill depth stops in the set. Are compatible with most drill bits. The sizes are as follows: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm,14mm16mm to meet your different needs.Limit Drilling DepthDouble wire hole has strong strength clamp, which can firmly lock the drill. It is used to precisely control the drilling depth and ensure the same drilling depth. And tighten the entire diameter of the drill bit without the screw touching the shaft.3-10mm Stainless Steel Drill Bit, Depth Stop Collars, Drill Bit Depth Stop, Drill Bit Depth Stop, Depth Stop Collars, Bit Positioner Collars, Locator Depth Stop RingGood Helper:1.Drilling depth limiter, Allen key makes it easy to adjust and install/uninstall the limiter.2.Helpful of these depth stop rings, you can quickly and easily drill holes with accurate depth.Installation Steps:1. Measure and confirm the size of the drill.2. Select the appropriate depth stop rings.3. Use the supplied Allen key to loosen the depth stop ring from the screw.4. Insert it into the drill from the top, tighten the screw with an Allen key.Specification:-Material: 304 Stainless Steel Made-Color: Silver-Length of the key: 58 mm- Dimensions: 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 14mm 16mmPackage Includes:-8 * Drill Limit Ring -1*Allen Wrench-1*Small Transparent Box