Drilax™ 5 Pcs Diamond Drill Bit ...$17.99
High Quality Diamond Drilling Tool Set of 5 Different Sizes: 3/8″, 1/2″, 5/8″, 3/4″, 1″
Over 80% cost savings compared to big box stores. Use with standard hand or upright drillers.
These tools do not have center pilot drills. There is no need for a center pilot drill.