ITEM NAME:100 x Rivet Nut Mixed Zinc Steel Insert Nutsert Threaded Case Kit Best Descriptio n Description: Feature: Rivet nuts can be installed in many different kinds of material including steel, plastic and fiberglass. Strong and corrosion resistant. Not easy to rust. Easy to use. Durable and practical. Specifications: Brand new Material: Carbon Steel, Zinc Plated Size: M4 M5 M6 M8 Quantity: M4 (25pcs); M5 (25pcs); M6 (25pcs); M8 (225pcs) Package Included: 100pcs x 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. Whatever the ending's perfect or not, you can't disappear from my world 100 x Rivet Nut Mixed Zinc Steel Insert Nutsert Threaded Case Kit Best.Rivet nuts can be installed in many different kinds of material including steel, plastic and fiberglass. Material: Carbon Steel, Zinc Plated. We'd like to settle any problem in a friendly manner. Whatever the ending's perfect or not, you can't disappear from my world.