Feature: This rivet nut tool kit set includes 300 rivet nuts in the most commonly needed SAE and metric sizes: 6-32, 8-32, 10-24, 10-32, 1/4"-20, M3, M4, M5, M6, M8 Rivet nuts are made of carbon steel, strong rust and corrosion resistant for a long time use; anti-oxidation, high strength, non-deforming, load-bearing threads Our rivet nuts are used to provide firm and problem-free attachment for screws and bolts in home improvement and for a wide range of manufacturing including automobiles, aircraft, appliances, furniture, decoration, and more Our set of 150 SAE and 150 metric rivet nut are organized into 2 segmented and clearly-labeled tool boxes for easy use wherever you need it, whether at home or in your workshop or factory These rivnuts kit is lightweight, very convenient to carry. Meanwhile, the transparent storage box is durable enough to accommodate all items safely Package Included: SAE Rivet: 50 x 6-32 25 x 8-32 25 x 10-24 25 x 10-32 25 x 1/4-20 Metric Rivet Nut: 50 x M3 40 x M4 30 x M5 20 x M6 10 x M8 1 x Box 【Rust & Corrosion Resistent】With zinc plated finish and carbon steel material, the rivet nuts is high-strength, load-bearing threads, rust and corrosion resistant 【Long Time to use】Our rivet nuts have been carefully polished to a smooth and lustrous surface, offering superior longevity and tight threading 【Widely Used】Suitable occasions such as in medicine beverage food chemical industry, air conditioning, fire fighting, gas, and more 【Advantage】The exterior grooves increase friction between our rivet nuts and the flat surface they are inserted into, offering resistance to unwanted movement 【Without Being Welded】 The precision-engineered threading allows our rivet nuts to be installed on all kinds of metal sheets and pipes without being welded