Various Mandrels - The rivet nut tool equipped with 7pcs interchangeable mandrels(Metric M6 M8 M10; SAE 1/4-20*2, 5/16-18, 3/8-16). | Easy for Use - The mandrel of Wetols 14" Rivet Nut can be easily removed by hand for easy mandrel change or maintenance. | Sturdy and Durable - The mandrels of our hand rivet nut tool is made from Chrome steel with heat treated 40℃ and the arm is made from 45 carbon steel, which protect against corrosion and resist to deformation. | Solid Blow Case - All Accessories are packaged in the blow molded carry case for easy storage and portability. Each tool is placed close to its position to prevent movement and scratching. | Complete Accessories - 70pcs rivet nuts (10 rivet nuts for each mandrel,20 rivet for SAE 1/4-20).Please note that the 1/4-20 mandrel was installed in the gun.