- GREENLEEUNIBIT DRILL BIT-#4 3/8 SHANK - MULTIPLE HOLE BIT 3/16 TO 7/843234403Call for PriceAvailability: Special OrderPETERSONUNIBIT DRILL BIT-#10 1/4 SHANK - SINGLE HOLE BIT 1/2" HOLE459U-10Call for PriceAvailability: Special OrderPETERSONUNIBIT DRILL BIT-#20 1/2 SHANK - HOLE ENLARG.BIT 9/16 TO 1"459U-20Call for PriceAvailability: Special Order