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This set is essential for safely drilling stone blanks. Set includes 2 carbide tipped pilot bits and 3 standard bits allowing you to safely drill holes for 7mm, 8mm, 3/8 in., 10mm and 25/64 in., tubes.
Penn-Stone 5 Drill Bit Set
This set is essential for safely drilling stone blanks. Set includes 2 carbide tipped pilot bits and 3 standard bits allowing you to safely drill holes for 7mm, 8mm, 3/8 in., 10mm and 25/64 in., tubes. For larger holes, use the included larger pilot bit then use acrylic or standard bit.
Drilling Instructions
