Special Insert Keep-nut drill bit 12x10

A special drill bit with a flat tip for drilling holes in hard materials (Concrete, Corian, Stone, Granite, HPL) for the use of KEEP-NUT® - Special Insert anchors. Recommended speed for the drill bit is 3600 - 6000 rpm. Water cooling is mandatory for cooling and extraction of the drilled material. It is necessary to adjust the drilling pressure (25-30 mm/min) to the hardness of the material (optimal drilling time per hole is 30 seconds).