The Ko-ken SKU 4282 is a 4-piece 1/2" Sq. Dr. generator service set, specifically designed for removing and installing belt pulleys on generators. This set includes the following components: a 100mm long triple square bit socket in M10 size (SKU 4020.100-M10), a 140mm long triple square bit socket in M10 size (SKU 4020.140-M10), a 100mm long round shank TORX bit socket in size T50 (SKU 4025.100R-T50), and SKU 185 which is a 17mm hex drive tool that slides onto the Round Shank TORX bit socket. All pieces are neatly organized and stored in a convenient bag, ensuring easy transport and efficient use on the job.