DETAIL SIZE 90 deg, 1/2 inch cutting diameter, 1/4 inch shank V-GROOVE ROUTER BIT For making signs and adding decorative accents to furniture and plaques. This "V" grooving bits are designed to cut deep or shallow 90 degree "V" grooves. THE CARBIDE CUTTER Use a whole carbide cutter welding on the bit, it makes cutting more stable and fast MUTI MATERIALS FIT Cuts all composition materials, plywoods, hardwoods, and softwoods