Made of durable, hardened metal with tensile strength, holds strong and lasts long. Includes 300 smaller-sized replacement e-clips for a wide variety of securing tasks. Kit includes 2mm, 4mm, 5mm, 6mm, 8mm, 9mm, 11mm, 12mm, 13mm, 14mm, 16mm, 19mm, 25mm, 26mm, 28mm, 32mm and 22mm sizes for any types of usages. External circlip for retention of bearings, gears, pulleys, etc. Set includes plastic storage case to keep clips neatly arranged and organized