Specification: Diameter 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, Hexagon Shank, diamond length 10mm, Maximum drilling depth 30mm, 5mm and 6mm, total length 68mm; 8mm-12mm,total length 80mm, Quantity: 2pcs totally Feature: Wax inside for cooling, Dry drilling without water Applying excessive pressure will not make the bit drill faster but will create excessive heat and subsecuently reduce the efficiency and life time For drilling granite & marble, masonry, concrete, tile/ceramic, glass, hard plastic..... Very high efficiency, multi-purpose drilling When drilling, the wax will melt to lubricate and cool the drilling surface Use a suction cup guide to enable an accurately positioned hole, Alternatively place the drill at a 45 degree angle. Drill until the drill bit starts to penetrate the material and then bring the drill up into the upright position and continue. ===================The End==================





