Package Include: Mandrels Metric M3*2pcs, this is a standard-length mandrel, which applies to regular-length nuts, and​ is designed specifically for installing regular-length rivet nuts. Hight Strength Material: FOREVTL mandrel nose pieces are made of high quality alloyed steel, combined with exquisite technology, extend service life effectively. Wide Applicability: The rivet nut mandrel is designed with broad tool compatibility to fit​ most popular series of manual rivet nut tools on the market. Warm Tips: Do not squeeze too hard when setting rivet nut; As small rivet nuts and mandrels are easily stripped, it would better to set the stroke according to different rivnut. Various Sizes: Metric M3, M4, M5, M6, M8, M10, M12; Standard SAE 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16, 1/2-13. FOREVTL Replacement Mandrel for Rivet Nut Tool, Manual Rivet Nut Gun Mandrel and Nose Pieces Accessary (Metric M3 2 Pack)