A quality Set of 40 hex star and spline bits made from Alloy Steel. Includes two Chrome Vanadium sockets. All of the bits with the exception of a few of the larger bits share the same 12mm diameter hex base which allows faster bit changes. Each bit has its size imprinted on the bit itself making it easy to identify them after you`ve removed a handful from the case. And to make tidying up quicker the case displays the bit sizes next to each housing. The set is supplied in a durable and hard wearing snap shut carry case with carry handle which makes it easy to move and store the set without losing components. Includes: 14 hex bits. 10 spline bits. 14 star bits. 2 sockets. Hex 30mm lon 4, 5, 6, 7, 8,10 & 12mm. Hex 75mm lon 4, 5, 6, 7, 8, 10 &12mm. Spline 30mm lon M5, M6, M8, M10 & M12. Spline 75mm lon M5, M6, M8, M10 & M12. Star 30mm lon T20, T25, T30, T40, T45, T50 & T55. Star 75mm lon T20, T25, T30, T40, T45, T50 & T55. Chrome vanadium sockets: 3/8 inch and 1/2 inch.