Multifunctional Drill Bits Ceramic Glass Punching Hole Working Sets Description: Multifunctional Drill Bits is made of industrial-grade 6542 HSS Carbide and durable alloy to perform excellent high-speed drilling. With W-type slot design, it allows easier chip removal and reduces resistance, resulting in smoother drilling. Ideal for everyday drilling on multiple materials including steel, alloy, tile, concrete, brick, glass, plastic, wood and more. FEATURES: Premium material 6542 HSS Carbide and durable alloy with reinforced head prevent bit cracking and provide longer life. Wide usage Strong carbide tip with spear pointed design can easily drill through various materials like tile, concrete, brick, glass, plastic, wood, etc. Easy chip removal W-type slot design provides low resistance, resulting in faster & smoother drilling and easier chip removal. Anti-slip shrank Triangular shank allows drill bits to be held tightly and prevents slip. Universal Can be installed in any standard electric drills. SPECIFICATIONS: Material: Hard Alloy Blade Top Corner: 135 Blade Diameter: 3-12mm PACKAGE INCLUDES: 1 x 3mm drill bit OR 1 x 4mm drill bit OR 1 x 5mm drill bit OR 1 x 6mm drill bit OR 1 x 8mm drill bit OR 1 x 10mm drill bit OR 1 x 12mm drill bit OR