The machine heads on our 55-year-old Yamaha 100 classical guitar were worn out and I was concerned that I could find a good replacement as there are so many products advertised. But these heads arrived promptly, were beautifully packaged and fitted the guitar absolutely perfectly. The four mounting screw holes even ligned up with the old holes! They are excellent value, very well made, look great and have no backlash. Highly recommended. Note: "Musiclily Pro 3 on a Plate Classical Guitar Machine Heads " does not mean (as I had stupidly thought) thatthere are only 3 (one side) in the box ... the box contains two sets.