ITEM NAME:175pcs Set Rivet Nut Kit Mixed Zinc Steel Rivnut Insert Nutsert Threaded M3- BX Specification: Brand new Material: Carbon Steel, Zinc Plated Head Type: Flat Size: M3, M4, M5, M6, M8, M10 Quantity: M3 (45pcs); M4 (45pcs); M5 (35pcs); M6 (20pcs); M8 (15pcs); M10 (15pcs) Feature: Rivet nuts can be installed in many different kinds of material including steel, plastic and fiberglass etc. A ribbed body holds the nut in place so it won't turn when tightening a screw. The tool collapses the nut, creating a backside flange that holds the nut to the material. Strong and corrosion resistant. Not easy to rust. Easy to use. Durable and practical. Package included: 45pcs x M3*9mm Rivet Nuts 45pcs x M4*11mm Rivet Nuts 35pcs x M5*13mm Rivet Nuts 20pcs x M6*15mm Rivet Nuts 15pcs x M8*18mm Rivet Nuts 15pcs x M10*21mm Rivet Nuts Note: Please allow a little size errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..45pcs x M3 9mm Rivet Nuts. Rivet nuts can be installed in many different kinds of material including steel, plastic and fiberglass etc. Size: M3, M4, M5, M6, M8, M10. Quantity: M3 (45pcs); M4 (45pcs); M5 (35pcs); M6 (20pcs); M8 (15pcs); M10 (15pcs).