Comparison : Item # SDSP-188-0400-2C, 3/16" x 4" SDS Plus Shank 2 Cutter Carbide Drill Bit 2" Usable Length
Item # SDSP-188-0500-2C, 3/16" x 5" SDS Plus Shank 2 Cutter Carbide Drill Bit 2-3/8" Usable Length - For 1/4" Tapcon
Item # SDSP-188-0600-2C, 3/16" x 6" SDS Plus Shank 2 Cutter Carbide Drill Bit 4" Usable Length
Item # SDSP-188-0600-2C, 3/16" x 6" SDS Plus Shank 2 Cutter Carbide Drill Bit 3-1/8" Usable Length - For 1/4" Tapcon
Item # SDSP-188-0700-2C, 3/16" x 7" SDS Plus Shank 2 Cutter Carbide Drill Bit 4-1/8" Usable Length - For 1/4" Tapcon