This is a metal lock nut kit in black color, designed specifically to fit a variety of Makita angle grinders including models 9005BZ, 9015B, 9505BH, 9527PB, 9527NB, 9015DB, 9561CV, 9016B, 9049, 9067L, 9077SL, 9564, GA7021, GA9040S (9" 15A), and GA5010Z (10.5A 5", 15A). The size of this nut kit is as shown in the picture, and it comes as a set of 1. Perfect for ensuring a secure fit and optimal performance of your Makita angle grinder.