pion muy resstente pero mal acabadoIt would seem that different manufacturers have a different idea about pitch size. The teeth on this are smaller than on other pinions of mine that are 48P so it is not compatible with some of my gear. It fits well with other bits of mine so I am not complaining. Will still continue to by things from HK.ok, max spokojny, odporucamOrdered this pinion gear. Within 1 hour of driving a small backyard track, it was stripped, and it was a plastic spur gear that stripped it - spur gear was fine, this metal is very soft. Would not buy again.