6542 Carbide and durable alloy with reinforced head bit cracking and provide longer life.Can be installed in any standard electric drills.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.1 x 10mm drill bit ORMaterial: Hard Alloy Top Corner: 135° Diameter: 3-12mmPremium material1 x 8mm drill bit ORWide usageEasy chip removalfor everyday drilling on multiple materials including steel, alloy, tile, concrete, brick, glass, plastic, wood and more.1 x 6mm drill bit OR1 x 3mm drill bit ORStrong carbide tip with spear pointed design can easily drill through various materials like tile, concrete, brick, glass, plastic, wood, etc.1 x 5mm drill bit ORW-type slot design provides low resistance, resulting in faster & smoother drilling and easier chip removal.1 x 4mm drill bit ORAnti-slip shrankUniversal1 x 12mm drill bit ORTriangular shank allows drill bits to be held tightly and slip.