Ordered to fit my key to my dynamometrique 1/2 Torx sockets 1/4 with obligatory passage through 3/8 (I have not managed to find in the market a direct adapter ...) This game is perfect I enter the square 1/2 of my dynamo in 3/8 then I Deputy adapter 2nd adapter that goes from 3/8 and ends in 1/4 square that can finally allow me use my small Torx. A laborious hair to explain but very easy to do: o) The set is in chrome vanadium (Cr-V) of the same quality to my kit Torx sockets. 7 For it's all good.