first time I used them to poke some holes they fell apart would not buy again don't want to share the bad reviews but after using the first one and breaking the second one may I do not handle the impact drill that I use, the steel is not hard enough and after some impact from the driver the metal moves to where it is heavy and sometimes it is almost impossible to take it off for other parts I advise against the purchase but some of us do despite the truth some of us have seen.To be honest I wouldn't buy this instrument in my life again, they are made in the USA but not good enough for my minimal use.