clearance Hole Saw Drill Bit Set Woodworking Opener Tool for Metal Thick Iron Plate Glass Marble 22mm

1、Higher Efficiency: Using internal medium and external three flute design bring higher efficiency not easy to collapse 2、For Various Materials: Hole saw drill bit can be used for cutting marble ceramic tiles wall stone floor tiles thick iron plate and other metal etc. 3、Reduce Opening Resistance: The cut out design is larger which reduces the resistance when opening the hole greatly more smooth cutting 4、Fast Speed: Drill bit provide fast drilling speed round hole without gap provide high working efficiency 5、High Speed Steel Material: Adopt good quality high speed steel material possess corrosion resistance good mechanical properties and high strength