EDM pinions 64 pitch 5T - 1,2mm hole, very accurate, plated with special black cover especially developed for Cahoza, this cover enhances lubricity 8 times and repels solder so teeth cannot be soldered through, after application the pinion hole is firmly cut to exact size and solder then sticks perfectly in, made from stainless steel 45 HRc, suitable for all types of gears, ideal for Cahoza 64 pitch gears