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.
Do NOT run dry. Diamond Coated Tools will work best if you use water to keep the tools cool.
Shank sizes vary, maximum shank is 1/4 - suitable for all common electric drillers.