Comparison : Item # STRT-125-0300, 1/8" x 3" Straight Shank 2 Cutter Carbide Drill Bit 1-3/8" Usable Length
Item # STRT-188-0350, 3/16" x 3-1/2" Straight Shank 2 Cutter Carbide Drill Bit 1-5/8" Usable Length
Item # STRT-188-0600, 3/16" x 6" Straight Shank 2 Cutter Carbide Drill Bit 4" Usable Length
Item # STRT-156-0600, 5/32" x 6" Straight Shank 2 Cutter Carbide Drill Bit 4" Usable Length
Item # STRT-219-0600, 7/32" x 6" Straight Shank 2 Cutter Carbide Drill Bit 4" Usable Length