Hlightweight metal aluminum, strong hardness, wear resistance, high temperature resistance, this kind of drill stop has a long service life, better performance than plastic, strong fixityThe drill bit limit ring set can accurately control the drilling depth without damaging the drill bit, with a nylon inner ring that is easy to lock and will not loosen, effectively avoiding wear and tear on the locking part of the drill bit. Making these drill depth limiting rings perfect for and DIY enthusiasts to use in production or repetitive drilling projectsThe inner diameter of the two fitted drill bit depth stop can be adjusted for precise application of different size drill bits. The one is suitable for 15/64inch-7/16inch; the small one is suitable for 3/64inch -3/16inch metal drill bitsThe drill stop can be used for furniture installation, ordinary tiles, wood, metal, plastic and brick.Colour:redMaterial:metal aluminumPackage Contents:2 x Countersink Drill Bits