High quality w/ metal material and plastic top. Two standards chrome tremolo arm screw fit with a 5MM + 6MM thread Please check your guitar ( use an M5 bolt and M6 bolt) .these will fit an M5+M6 thread Chrome plated, includes three plastic end cap Fits a lot but not all tremolo bridges The shafts are 5mm+6mm diameter and is threaded to be screwed into a tremolo bridge. The threads are M5+M6 (thread diameter 4.8mm +5.8mm and thread spacing 1mm). Please note that not all tremolos have the same shaft thread, although these are 5MM+6MM appears to be the most common.