Diamond Coated Jobber Drill Set of 50
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Set consists of 10 tubes of 5 each #36, #40, #45, #50, #52, #54, #56, #61, AND #65.Use to drill stones, glass, pearls and ceramics. Diamond is evenly plated on High Speed Steel blanks for maximum life. Medium/Fine grit. Always use a small amount of water or coolant when drilling for longer drill life and faster cutting. 1-1/4" coated portion.