How would they machine a socket driver? When I look at a socket on the back side the square socket side, the angles are very sharp with maybe a very slight radius, whats the standard procedure to machine this? I see some radius on these look to be less than 2mm even, how can they get that deep with such a narrow bit? I am designing something similar but I am not 100% sure on the bit size or depth etc, is there an ASME standard or machining drawing to cover radius etc. maybe a radius to length of flat ratio or something?