Package contains only 3 woodworking cutters [dimensions] suitable for 5/16 (8mm) handle drill bits, support motor drill bits. Cutting diameter length: 7.93/9.52/12.7mm. [material] this product adopts yg6 carbide with sharp edges, high hardness, precise positioning, smooth cutting and impact resistance . [application] these 1/4 shank cutters are suitable for solid wood panels, MDF, particle board, design profiles for smooth and thorough cutting as well as producing elegant furniture. They are also suitable for milling grooves on frames, panels, clocks, lathes and other wall tools to create keyhole hangers or create cable grooves. [features ] the cemented carbide blade has high-quality welding, which can provide stable quality and high efficiency, without worrying about breakage and tilting problems during working. The blade is sharp and durable, designed with a curved curve for easy disassembly and more efficient punching.