Full Size Set: DKIBBITH 7 Packs of Dry Diamond Drill Bits Round Shank 3/16", 1/4"(x2), 5/16", 3/8", 1/2"+1 Pack Drill Bits1/4" Dry Drilling Design: Each Diamond Core Drill Bit is integrated with wax lubricant inside; it will melt and cool the bit tip to...