A coolant should always be used when drilling with TCT twist drill bits. Irwin suggest the use of a 3- 6% emulsion. The coolant will extend the lifetime of the drill bit.
Irwin HSS TCT tip drill bit.
Specifications:
Diameter: 12.0mm.
Total length: 151mm.
Working Length: 101mm.
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Specifications
IRWIN®
Drill Bits & Holesaws
Metal Drill Bits
China
Drill Bits - Metal
IRWIN®
151mm
1
12.0mm
Metal Drill Bits
101mm