Package Included: 1 x Rivet Nut Gun 11 x Mandrels (M3, M4, M5, M6, M8, M10, M12, 10-24, 1/4-20, 5/16-18, 3/8-16) 1 x Wrench Specifications: Material: Metal+ABS Colour: Red+Black Applicable Head: M3-M12 Maximum working stroke: 9mm Maximum working effective stroke: 7mm Pulling force: 100N Features: The nut riveter set includes seven different sized mandrels including M3, M4, M5, M6, M8, M10, M12,3/8-16, 5/16-18, 1/4-20, 10-24. Ergonomic handles with double compound hinges to improve durability Unique spring loaded inner hex sleeve automatically locks the rotation of hand installed mandrel. This rivet gun comes with 11 interchangeable mandrels sets and rivets nuts in various sizes, making sure to meet all your needs Ideal when there’s limited access to the rear of a panel, great for sheet metal fabrication. Note: Interchangeable Mandrel: M3 x 1, M4 x 1, M5 x 1, M6 x 1, M8 x 1, M10 x 1, M12 x 1,3/8-16 x 1, 5/16-18 x 1, 1/4-20 x 1, 10-24 x 1 Rivets Nuts: M3 x 10, M4 x 10, M5 x 10, M6 x 10,