This is one of my first attempts at making a Design we have some sockets at work that use ½" attachment but all our handles are  3/8" so designed this for the ocational use we need those for 

recommend 40+ infill with a few extra walls and print on side with supports for strength  though for lighter use printing directly up should be fine too,i used standard white PLA and for our use they seem fine 

haven't tried but im sure people in the know could scale to use for different sizes