The CORWIN K1 is a newly designed rivet nut tool that combines enhanced stability with effortless operation. Featuring a simple and efficient lever system, the tool is lightweight, significantly reducing operator fatigue. Its thoughtfully designed structure minimizes the learning curve, making it easy to start using right away. The rivet rod is equipped with a step to limit the stroke when installing smaller rivet nuts, while the release rod has laser-etched stroke scale marks, improving installation success rates and ensuring consistent results. This all-new kit includes 200 rivet nuts, with separate storage boxes for SAE and Metric sizes, all securely housed in a compact, portable carrying case. The rivet accessories are organized in transparent, color-coded plastic boxes, neatly arranged for easy access, ensuring that every part is well organized and convenient to use. Tool Dimensions: 16 inches in length, weighing 1045g. Rivet Nut Sizes: M3, M4, M5, M6, M8, M10, M12, 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16, 1/2-13. Contents: 1 x 16-inch Rivet Nut Gun 1 x Instruction Manual (English) 200 Rivet Nuts: Metric: M3 (20 pcs), M4 (20 pcs), M5 (10 pcs), M6 (33 pcs), M8 (8 pcs), M10 (4 pcs), M12 (5 pcs) SAE: 6-32 (14 pcs), 8-32 (10 pcs), 10-24 (33 pcs), 10-32 (10 pcs), 1/4-20 (33 pcs), 5/16-18 (8 pcs), 3/8-16 (8 pcs), 1/2-13 (2 pcs) 15 x Mandrels: Metric: M3=1, M4=1, M5=1, M6=1, M8=1, M10=1, M12=1 SAE: 6-32=1, 8-32=1, 10-24=1, 10-32=1, 1/4-20=1, 5/16-18=1, 3/8-16=1, 1/2-13=1 1 x Blow-molded Carrying Case 1 x Cardboard Divider