[SIZE] - 6mm bore 8mm thickness drill stop. Hex wrench is included to help adjust and install the stop rings.. [MATERIAL] - Strong and durable steel with black-oxide finished for better corrosion-resistance. Set screw type will stay sturdy when tightened and is specially designed not to break the bits.. [ADJUSTABLE] - Drill stop bit can be quickly and easily adjusted at any point on drill bit flutes, helps to drill holes to exact depths, prevents under and over drilling.. [APPLICATION] - Set-screw type drill stop is suitable for low axial loads and simple positioning. It is great for jobs that use a bit and need precision.. [NOTICE] - For maximum holding power, make sure the set screw material is harder than your shaft material. Do not move the drill bit stop after tightening..
