Material: Carbon steel Box size: 17.6*10.2*2.3cm (6.9*4*0.9 inches) Size: As shown Color: Silver 100% brand new and high quality Type: Cotter Pin Description: Size: M1, M1.2, M1.5, M1.8, M2, M2.5, M2.8, M3.5. A total of 8 commonly used sizes to meet your various needs. High-quality material: Made of carbon steel, corrosion-resistant, durable, and sturdy for long-term use. Wide applications: Widely used in mechanics, automotive, car repair shops, workshops, power equipment, trucks, cars, lawnmowers, small engine repair and fastening, etc. Unique design: Hairpin design for quick bolt and pin fixing. Special locks ensure tightness and durability. Insert the cotter pin into the nut groove and the rear hole of the bolt after tightening the nut, and pull off the tip of the cotter pin to prevent relative rotation of the nut and bolt, completing the installation. Packaging: 125 pieces in total, packaged in a durable transparent box with a label. Package includes: M1*17mm (30pcs) M1.2*21mm (25pcs) M1.5*28mm (20pcs) M1.8*37mm (15pcs) M2*40mm (10pcs) M2.5*45mm (10pcs) M2.8*50mm (10pcs) M3.5*75mm (5pcs) Total 125 cotter pins Note: 1. There is a 2-3% difference according to manual measurement. Please check the size carefully before you buy the item. 2. Please note that a slight color difference should be acceptable due to the light and screen.