Draper 37 piece magnetic insert screwdriver bit set assorted sizes comprehensive kit including 6 x 14 plain slot insert bits size 4 7mm x 25mm long 3 x 14 cross slot insert bits no1 3 x 25mm long 3 x 14 pz type insert bits no1 3 x 25mm long 7 x 14 draper tx star insert bits t10 t40 x 25mm long 5 x 14 hexagon insert bits size 3 6mm x 25mm long 2 x 14 plain slot insert bits size 55 and 70mm x 50mm long 3 x 14 cross slot insert bits no1 3 x 50mm long 3 x 14 pz type inse