COUNTERSINK DRILL BIT SET FOR METAL - 5 PC HIGH SPEED STEEL WITH 5% COBALT HSS-Co M35 GRADE, SIZES 1/4", 3/8", 1/2", 5/8" & 3/4" - 5 FLUTES w/ 82 DEGREE -
Milwaukee 5/8 in. x 8 in. 4-Cutter SDS-PLUS Carbide Drill Bit 48-20-8300 - The Home Depot
3pcs/set Hss Co Cobalt M35 Spiral Flute Step Drill Bit 1/4" Hex Shank 3-12mm 4-22mm 6-24mm Metal Hole Cutter Core Drill Bits - Drill Bit - AliExpress
New Avanti PMAPC1040 Avanti Pro Drill Bit, 1/4 in Dia, 6 in Oal, Percussion, 2-Flute, 10 Mm Dia Shank, Straight Shank,Each - Walmart.com
CONQUER Tools 5 Flute Metal Countersink Drill Bit, 90 Degree for 1/4'' Hex Shank Fit 1/8"-3/4"(3mm-19mm), Burr Removal, Deburring Beveling Chamfer Tool, Holes Shaping Trimming, Inner/Pipe Reamer - - Amazon.com
WEN Tri-Flute Versatile Steel Auger Drill Bit Set with Carrying Case (6-Piece) DB613A - The Home Depot