Review of 29 Piece Drill Bit Industrial Set-Cobalt M42

I just drilled 30 holes in 17 gauge hot rolled steel (soft steel) and 3 of the drill bit diameters I used resulted in both chipped and crushed cutting edges.To top things off the shafts on all three of the bits are soft as well and the jacob chuck clamp created grooves on the shaft 1/32" of an inch deep.The bits wont even go back in their cheap plastic cartridges because of the mangled shafts.I am looking to replace them with higher quality steel alloy bits asap.

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Product Description:

Features and Benefits:

• Cobalt steel extends cutting edge life and maintains cutting life after resharpening
• Extra hard drill for greater wear
• 135 degree split point tip starts on contact, cuts with less force
• Rubber overmolded case protects kit if dropped
• Tap and Drill selection chart for convenience reference

Automatic indexing for easy bit access and identification. Removable cartridges: easy to carry bits from case to worksite. Set contains the following drill bit sizes: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/16", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2".






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