FeaturesCollection - Blu-Mol XtremeSafety collar stop prevents over-cutting for safer and faster performanceSide hole effectively removes chips for added speed of operationSelf ejecting plug removalA set of three cutting edges balances the cutting for long blade lifeSpecial tungsten carbide tips have long edge life and excellent heat resistanceBit Diameter - 2 in. (25 mm. Xtreme Tri-Cut Tungsten Carbide Hole Cutter These cutters are durable and easy to use.