- Complete set of 340 retaining rings made of 65 manganese steel, with black coating for maximum corrosion resistance - Assorted in sizes M3*9 (60 pcs), M4*12 (60 pcs), M5*12 (60 pcs), M6*14 (50 pcs), M8*18 (50 pcs), M10*20 (40 pcs), M12*25 (20 pcs), covering multiple fastening needs - Smooth edges for easy installation and to prevent damage to components - Provide spring force for a secure fit on screws and shafts - Ideal for maintenance, repair, and assembly work in machinery, appliances, and automotive applications - Absorb impacts, insulate, and allow for quick and efficient maintenance - Includes transparent plastic organizer box with hook for easy storage and access