describe: 100% brand new and high quality Rivet spacer and nut thread need to be assembled. Easy to use and avoid losing. Save money on replacing nut rivet mandrels instead of buying new rivets! Fits many standard nut rivets. Made of high-strength steel. Specification: material: metal Quantity: 2 Notes: Transition: 1 cm = 10 mm = 0.39 inches No retail packaging. Please allow 1-3mm error due to manual measurement. Make sure you don’t mind before you bid. Due to the differences between different monitors, the pictures may not reflect the actual color of the item. Thanks! Package included: 2 x rivet gun chuck (excluding rivet gun) M3 + M4