Make it Snappy Flat Bottom Counterbore - Tin Coated 5/16 Inch

Dremel 631 Brad Point Bits - Titanium coated 4 Pieces 1/8" 5/32" 3/16" 1/4"

woobles Dry Diamond Drill Bits - Diamond 5 PCs 1/4, 5/16, 3/8, 1/2 inch

Neiko 10047A - M2 HSS Steel 5-Piece 1/8, 3/16, 1/4, 5/16, and 3/8-Inch

DeWALT Dw5228 - Carbide 5/16-Inch

WSOOX Square Hole Drill Bits - carbide 1/4 inch 5/16 inch 3/8 inch 1/2 inch

STROTON 5% Cobalt Drill Bit Set - 5% Cobalt 21PCS 1/16-3/8 Inch

Make it Snappy 3-Flute Flat Bottom Counterbore - 7/16 Inch

Bosch Ti2137Im - Titanium Nitride Coated 1-Piece 5/32 In.

COMOWARE Stubby Drill Bit Set - HSS M2 5pcs 3/32" 1/8" 3/16" 1/4" 5/16"

Milwaukee 48-89-1105 - Titanium-Coated 20-Piece 1/16-to-1/2-Inch