There are standard tungsten carbide glass drill bits with spear-shaped tips and diamond-coated glass drill bits are more ... Bosch GT2000 4-Piece Carbide Tipped Drill Bit Set. Now 11% Off. $19 $17 ...

Between fabbing stuff 5-10 times a day for the trucks at work, and general use (drilling through firewalls, extracting stuck bolts, etc), I use my bits pretty much everyday.

Bosch Power Tools & Accessories launched its Bulldog Xtreme8 SDS-plus concrete drill bits and Blue Xtreme carbide-tipped drill bits for advanced durability and dependability.