Jumbo grip grooved handle design ensures maximum torque for tough jobs Made with super acetates these handles are virtually indestructible Shafts made of the highest quality Chrome Vanadium steel for long life and maximum durability Black hardened magnetic tips eliminate chrome plating chipping off the tip (common on other brands) holds the screw to the screwdriver and ensures maximum durability and life All items meet ANSI specifications U.S. Specifications GGG-S-121E and Canadian Government specifications CDA39-GP-17C Handle Type Jumbo; Acetate Includes Slot Square Shank 1/4" x 1-1/2"; 1/4" x 4"; 5/16" x 6"; 3/8" x 10"; Phillips #1 x 3"; #2 x 1-1/2"; #2 x 4"; Torx T10; T15; T20; T25; T27; T30 x 4" Magnetic/Non Magnetic Magnetic Material Chrome Vanadium No. of Pieces 13 Pcs. Shank Type Round; Square Standard(s) Met CDA39-GP-17C; GGG-S-121E; ANSI Tip Style Slot; Phillips; Torx