Shpwfbe Tools Drill Bit Hole (7Pcs) Bits -Multifunctional Drill Ceramic Glass Sets Working Led Projector

5mm cutting diameter: 42mm / 1.7in Strong carbide tip with spear pointed design can easily drill through various materials like tile concrete brick glass wood etc. 1. material Can be installed in any standard electric drills. Triangular shank allows drill bits to be held tightly and slip. 3mm cutting diameter: 40mm / 1.6in 4mm cutting diameter: 42mm / 1.7in 2.Wide usage 7pcx Drill Bits 8mm cutting diameter: 66mm / 2.6in Universal W-type slot design provides low resistance resulting in faster & smoother drilling and easier chip removal. 3.Easy chip removal Drill Bit 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. 6mm cutting diameter: 55mm / 2.2in 4.-slip shrank 10mm cutting diameter: 70mm / 2.8in 12mm cutting diameter: 75mm / 3.0in 5. Different sizes TIME & EFFORT for your metal/wood drilling project! Package including： 6542 Carbide and durable alloy with reinforced head bit and provide longer life. for everyday drilling on multiple materials including steel alloy tile concrete brick glass wood and more.