"High speed steel with split point that keeps the drill from skating on hard materials and eliminates the need for a center punch. All 3/16"" and larger have 3 flats on the shank so that the chuck gets a better grip on the bit.""High speed steel with split point that keeps the drill from skating on hard materials and eliminates the need for a center punch. All 3/16"" and larger have 3 flats on the shank so that the chuck gets a better grip on the bit." See More
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"High speed steel with split point that keeps the drill from skating on hard materials and eliminates the need for a center punch. All 3/16"" and larger have 3 flats on the shank so that the chuck gets a better grip on the bit."