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3-1/8 in. CARBIDE TIPPED BIT, Breakthrough Drill Bit, SDS Max (3.125" X 20" X 24 | eBay
Bosch SDS-max Thru-Hole Rotary Hammer Bit 2-1/2-in x 24-in Carbide Masonry Drill Bit for Sds-max Drill in the Masonry Drill Bits department at Lowes.com
15pcs Pilot Drill Bits 5mmx56mm M42 HSS 2-Flute Pilot Drilling Drill Bits For Hole Saw Arbor Reduces Lock-up On Breakthrough - AliExpress