Exceptional value for money set of TEN mixed screwdriver bits which come with their own handy plastic holder, as shown. They are manufactured from heat treated 40CR alloy steel and have a 1/4" hexagonal shaft, with a length of 25mm. Also included is a 60mm magnetic bit holder, therefore increasing the length of the bit if you wish, enabling you to reach hard to access areas. Sizes include: Phillips - #1, #2, #3; Torx - T10, T15, T20; Slotted - 4.5, 5.5, 6, 6.5mm. Universal and ideal for cordless screwdrivers plus they fit all standard drill chucks and hand interchangeable screwdrivers.