The 20 Piece Speed-Chuck Screwdriver Set gives you the power of 18 individual screw and nut drivers in a convenient, all-in-one design. Simply pull back on the Speed-Chucks spring-loaded collar for effortless swapping of attachment blades. In addition, the extended-length shafts allow easy access to remote or obstructed fasteners. Offers the power of 18 screwdrivers in a single design. Set Includes 18 Interchangeable blades: 1/8, 9/64, 5/32 in. Slotted, number 0 and 1 Phillips, T6, T7, T8, T9, T10, T15, T20 Torx, 3/32, 7/64, 1/8 in. Ball Hex, 3/16, 7/32, 1/4 in. Nut Driver. Speed-Chuck extension provides an additional 3-1/2 in. of reach. Black Oxide coating on blades prevents rust and corrosion. Fitted vinyl pouch for convenient storage. Exclusive Versa-Grip handle for comfort and control.