Heller Tools 3900 Glass & Tile Drill Bits, 1 V, Silver, Set 5 pcs. Ø 4/5/6/8/10

for rotary drilling in glass and soft ceramic materials pointed centring cutting edge which can be sharpened at any time allows for precise drilling heller quickbit system: perfectly designed for use with cordless machines fastest switching between drills and bits "1/4"" hexagonal shank prevents the drill bit from slipping into the drill chuck", Weight: 0.22 pounds, Manufacturer: Heller Tools