[INTRODUCTION]: Straight Grooving Cutter,Shank diameter*blade width*blade length=1/4''*1/2''*11.9mm=6.35mm*12.7mm*11.9mm .(The specific size can refer to the picture).Industrial grade Grooving Cutters with high welding quality, quality stable, high efficiency. Provide more convenience for your daily woodworking. Cut in a smooth tooth width that produces clean, crack-free. [MATERIAL]: Our cutters are made of solid hardened steel and C3 grit carbide. (C3 grade carbide is the highest grade used in the router bit industry). Precise product design creates smooth, detailed cuts suitable for all levels of intricacy. [PERFECT DESIGN]: Hardened steel body with anti-kickback design. Balance tolerance of +/- 0.003" (allowing smooth operation at very high RPMs). 3 C3 carbide tipped - Micro-grain grade provides maximum strength and durability. [WIDE USE]: Router bit tools can cut most materials including: wood, MDF, particle board, plywood, panel, softwood, hardwood, etc. Suitable for handcrafting of a drawer or any other woodworking, can be used to join wood from edge to edge or end to end.Perfect choice of professionals and amateurs. [ Where to use]Designed for laptop or desktop wood engraving machines, such as hand-held and table-mounted CNC routers.Note: It cannot be used in power drills and drills.