Draper Insert Bit Set 37 Piece Comprehensive bit set for use with hand and power tools Display packed in soft grip plastic case Contents:  6 x 1/4" plain slot insert bits size: 4-7mm x 25mm long   3 x 1/4" cross slot insert bits: No 1-3 x 25mm long   3 x 1/4" PZ TYPE insert bits: No 1-3 x 25mm long  7 x 1/4" Draper TX-STAR insert bits: T10-T40 x 25mm long   5 x 1/4" hexagon insert bits size: 3-6mm x 25mm long  2 x 1/4" plain slot insert bits size: 5 5 and 7 0mm x 50mm long   3 x 1/4" cross slot insert bits: No 1-3 x 50mm long   3 x 1/4" PZ TYPE insert bits: No 1-3 x 50mm long    4 x nut driving bits size: 5-10mm   1 x bit holder