Feature:1. Easier Drilling: Having been through exquisite workmanship, all the drill bits have incisive blade, which has low resistance for easy cutting.2. Smoother in Use: Incisive blade design will better facilitate the chip removal and reduce the clogging, making the work smoother and efficient.3. Including 15Pcs: There are 15pcs different saw bit of 6mm, 8mm, 10mm, 12, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 26mm, 28mm, 30mm, 40mm and 50mm.4. Excellent Emery: Adopting premium emery material with high hardness, the hole saw drill bit is not likely to deform under high speed operation.5. Universal Shank: Comes with a universal shank, this lightweight and compact wood drill bit can be quickly installed and firmly fixed on tools.Specification:Item Type: Hole SawMaterial: EmeryOpening Diameter: Approx. 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47in, 14mm / 0.55in, 16mm / 0.63in, 18mm / 0.71in, 20mm / 0.79in, 22mm / 0.87in, 25mm / 0.98in, 26mm / 1.02in, 28mm / 1.1in, 30mm / 1.18in, 40mm / 1.57in, 50mm / 1.97inCompatible Devices: For hand drill and table drill. Use: For ceramic tiles, glass, red bricks, marble. .Package List:15 xHole Saw