Flextorq, 9 Piece, Impact Driver Bit Set, Set Includes: 6" Locking Bit Holder, 3" Locking Bit Holder, 1/4" x 1-7/8" Compact Nut Driver, 5/16" x 1-7/8" Compact Nut Driver, (5) 1" Bit Tips, The Locking Bit Holder, With Quick Change Mechanism, Magnetism , Accepts Both 1" & 1/4" Hex-Shank Accessories, Compact Nut Drivers For Accessibility, Magnetism For Fastener Retention, Engineered For Use In Impact Drivers, Typical Applications Include Wood & Metal.