The urban center 48-89-2736 15/32 in. Thunderbolt Black compound bit options black oxide construction for sturdiness and a thick core to guard against side-load breakage. The parabolic flute type helps withdraw junk and chips to stay the bit cool, and this bit is superb for drilling on serpentine surfaces.
Thunderbolt internet, provides longer life and quicker driller times
Parabolic flute, clears chips quicker
Black compound construction for sturdiness
135?? split purpose, preciseness begin no walking