I agree with both of you. That you should not assume but my point is that if sets are advertised as "Guitar Machine Heads" , Guitar Machine Heads, i.e 6 minimum should be supplied, especially Kluson styles that were made from 1925 onwards for Gibsons, Fenders etc.So although its a pain in the ginger. I have learnt a costly lesson. I suggested to the company that if only 4 pieces per set are their standard for these then they should not be advertised as sets of "Guitar Machine Heads" without some sort of statement to the effect that 4 piece sets are their standard (because one customer buys heaps to place on his 4 string ukeleles they think that 4 piece sets are standard for these.So it shows their inexperience and lack of knowledge) BTW they also sell fuel pumps, shoes and fabrics, so I am guilty of "assuming" and will not do that again. This should also be a lesson for other buyers of parts from Asian suppliers. One other thing . Lots of asian companies state that they manufacture parts, but they are full of crap. You find out later that they are actually trading companies and know nothing about guitars. One company that supposedly manufactured parts asked me to explain to them what a Tele bridge was. Even though they reckoned they made parts to suit Fender style guitars.