Sealey 42 Piece Bit Set TRX Star Spline Hex Bit & Driver AK219. This 42-piece bit set is a perfect addition for any busy garage/workshop. Featuring full Chrome Vanadium steel hex drive bits, in both 30mm and 75mm lengths, it contains a selection of Torx, Hex and Spline bits with a 3/8 and 1/2 inch drive bit adaptor. All supplied in a handy storage case, with inclined trays for easy bit selection. Key features: 30mm and 75mm bits included, supplied in a handy storage case, 42 piece bit set, Chrome Vanadium bits, 3/8 and 1/2 inch adaptors.