Features： 1、QUICKLY CUT: Coring bit hole saw is made of 45 steel teeth for quickly cutting clean round holes, saving both labour and time 2、SPLIT TO PREVENT DAMAGE: Split pilot drill can prevent damage and deviation by guiding the tool step by step to the material, very practical 3、FOR VARIOUS MATERIALS: This cutting tool is suitable for steel, metal, aluminum, wood, etc., support various materials, more convenient 4、ACCURATE CUTTING AND SMOOTH CLEANING: The tip is hardened and designed to be of sharpness with staggered cutting teeth for accurate counterbore and smooth cleaning 5、DURABLE CARBIDE: Carbide material possess high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance Specification： Item Type: Tungsten Carbide Teeth Hole Saw Material: 45 Steel + carbide Size: Hole Saw Length: Approx. 8cm / 3.1in, Core Drill Length: Approx. 6.8cm / 2.7in Punching Depth: Approx. 25mm / 0.98in Package List： 1 x Hole Saw 1 x Coring Drill 1 x Hex Screwdriver 1 x Storage Box