The BOSTITCH BSA237QLM 37-Pc. Quick Load Set features a quick load holder which creates a fast and easy way to change bits. Designed with shock resistant steel for longer life, and heat treated to reduce breakage and wear. These bits have a 1/4 inch hex shank. Set Includes: (1) Quick load holder, (2) 1" PH1 bit tip, (8) 1" PH2 bit tip, (2) 1" PH3, (1) 1" SL6 bit tip, (2) 1" SL8 bit tip, (1) 1" SL10 bit tip, (2) 1" T20 bit tip, (2) 1" T25 bit tip, (2)1" SQ1 bit tip, (2) 1" SQ2 bit tip, (2) 1" SQ3 bit tip, (1) 3.5" PH2 bit, (1) 3.5" SQ2 bit, (1) 1/4" Nutsetter, (1) 5/16" Nutsetter, (1) Bit tip holder, (5) Hex Shank Drill Bits (1/16", 3/32", 1/8", 5/32", 3/16").