THUNDERBIT®/Cobalt – 135° Split Point
• For drilling at higher speeds in tougher drilling conditions
• Feature 135° split points for easier drill starting without the need for center punching
• Heavy duty web construction for higher strength and less breakage
• Improved chip ejection through a specially engineered flute design

DBTBC121 21 pc Cobalt Thunderbit® Drill Bit Set
• For drilling at higher speeds in tougher drilling conditions
• Feature 135° split points for easier drill starting without the need for center punching
• Heavy duty web construction for higher strength and less breakage
• Improved chip ejection through a specially engineered flute design
• Set contains DBTBC1/16 thru DBTBC3/8 (21 bits) in B121B metal drill index
DBTBC129 29 pc Cobalt Thunderbit® 135° Split
Point Drill Bit Set (1/16–1/2")
• For drilling at higher speeds in tougher drilling conditions
• Feature 135° split points for easier drill starting without the need for center punching
• Heavy duty web construction for higher strength and less breakage
• Improved chip ejection through a specially engineered flute design
• Set contains DBTBC1/16 thru DBTBC1/2 (29 bits) in B129B metal drill index