Comparison : Item # MPD4SCT01, 1/4" x 2-7/8" Carbide Tipped Pilot Drill Bit, Steel, Round
Item # MPD4SCT05, 1/4" x 2-7/8" Carbide Tipped Pilot Drill Bit, Steel, Round
Item # MAPD3CT, 1/4" x 3-3/32" Carbide Tipped Pilot Drill Bit, Steel, Round
Item # MAPD3C, 1/4" x 3-3/32" Pilot Drill, Steel, Round
Item # MAPD301, 1/4" x 3-3/32" Pilot Drill Bit, Steel, Round