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✓Enhanced M42 Alloy Material: These drill bits for metal contain an 8% cobalt alloy that delivers 10x life vs. Standard bits
✓Cobalt M42 Drill Bit: Provides upgraded M42 cobalt drill bits, jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
✓Surface-hardened Tip: The Cobalt drill bits for hardened steel penetrate tough, abrasive materials
✓High-heat Resistant Bits: This drill bit set for metal withstands high-temperature applications for extended periods of time
✓Thick Web-helix Design: The BOSCH drill bit set features a thick web-helix design that provides additional stability in tough applications
✓Includes: A versatile drill bit for metal assortment featuring 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8", and 1/2" sizes