High-quality cemented carbide. With an improved head, it can prevent the drill bit from cracking and extend its service life. Pear-shaped point design. With strong toughness and wear resistance, it solves the problem of drill bit drift and slippage. The cemented carbide lance can accelerate the cutting speed and prevent cracking. Low cutting resistance, improves core drilling speed, and saves time. These drill bits will drill without chipping or cracking when used correctly. Multifunctional drill bit kit. Used for drilling glass, tile, porcelain, ceramic, and other hard and brittle materials. Ideal for wood, metal, plastic, cement and other fragile materials. Package Dimensions: 16.1 x 13.9 x 1.7 cm; 190 grams 869 in Drill Bit Sets Features: The pointed tip reduces blowout and the bit features a carbide tip. Used for drilling glass, tile, porcelain, ceramic, and other hard, brittle materials. Carbide tip for fast cutting speed and longer tool life. Low cutting resistance, improves