I ordered this adapter set, because I Socket sets in different inch sizes (1/4 ", 3/8", 1/2 ") used and also possess some special nuts. It has immmer annoyed me when I some ratchets (eg torque wrench wanted kompinieren) or nuts / Renewals together because inch sizes have then not fit together. This adapter kit I can use any nut with each ratchet, which I think is just great! Was already faithful service rendered and saved me many a tantrum! Could so far nothing negative in the use notice (screw the car). Price / performance fit, from me, there's a strong buy recommendation!