Premium material6542 Carbide and durable alloy with reinforced head bit cracking and provide longer life.Multifunctional Drill Bits is made of industrial-grade 6542 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.Triangular shank allows drill bits to be held tightly and slip.Can be installed in any standard electric drills.Strong carbide tip with spear pointed design can easily drill through various materials like tile, concrete, brick, glass, plastic, wood, etc.for everyday drilling on multiple materials including steel, alloy, tile, concrete, brick, glass, plastic, wood and more.Easy chip removalAnti-slip shranksize:(6-12mm）：6/8/10/12mmMaterial: Hard Alloy Top Corner: 135° Diameter: 6-12mmWide usageUniversalW-type slot design provides low resistance, resulting in faster & smoother drilling and easier chip removal.4 x Multifunctional Drill