ABOUT US: ZIOJOVK tool has always been up to the mark with our marvelous range of tools. Professional 16”Rivet Nut Setter Kit features longer carbon steel arm maximizing leverage for saving user energy. Come with 17PCS interchangeable mandrels and 256pcs rivet nuts. Use Guide: 1. Choose the right mandrel sets for rivet size, install it onto the tool head. 2. Insert the gun top into the hole for riveting. 3. Close the handle, rivet the nut to the right position until the nut is secure. 4. Withdrawn rivet tool by rotating the knob in a counterclockwise direction, complete the riveting. Package Includes: 1 × 16 inch Rivet Nut Gun 15 × Mandrels?M3?×1 ?M4?×1 ?M5?×1 ?M6?×1 ?M8?×1 ?M10?×1 ?M12?×1 ?6-32?×1?8-32?×1 ?10-32?×1?10-24?×2 ?1/4-20?×2 ?5/16-18?×1?3/8-16?×1 ?1/2-13?×1 256pcs Rivets Nuts?M3?×20 ?M4?×20 ?M5?×20 ?M6?×20 ?M8?×10 ?M10?×10 ?M12?×10 ?6-32?×20?8-32?×20 ?10-32?×20?10-24?×30 ?1/4-20?×30 ?3/8-16?×10 ?5/16-18?×10?1/2-13?×6 1 × Multifunctional Spanner 1 × User Manual Please note that the M8 mandrel was installed in the gun. The ZIOJOVK tool brand offers a variety of rivet nut tools, a variety of rivet nuts and replacement tips. Click the "by ZIOJOVK tool" link under the product title to discover more items that may interest you.