Packaging includes: There are 13 sizes in the cotter pin clamp combination kit, totaling 60pcs(Please refer to the picture for detailed dimensions). Hairpin Cotter Pin(33pcs): M1.5x25mm x 9pcs, M2.5x25mm x 6pcs, M2.5x30mm x 6pcs, M3.2x30mm x 6pcs, M3.2x40mm x 4pcs, M4x60mm x 2pcs; R Clips Cotter Pin(27pcs): M1x16mm x 6pcs, M1.5x21mm x 6pcs, M1.6x28mm x 6pcs, M1.8x35mm x 3pcs, M2x40mm x 2pcs, M2.5x50mm x 2pcs, M3x65mm x 2pcs Heavy-Duty Construction : Made from high-quality 304 stainless steel, these R clips retaining pins are built to last. With their sturdy construction and corrosion-resistant finish, these hitch pin clips provide long-lasting durability. Rest assured, our heavy-duty R clips hardware pins are designed to meet your toughest challenges Product features : The cotter pin can be directly inserted into the hole to quickly and safely fix all kinds of nuts and bolts, which can prevent the relative rotation of nuts and bolts and is easy to install and disassemble Convenient & practical: Cotter Pin Assortment Kit is packed in a reusable box with easy-to-read size labels, which is easy to carry and manage and can meet your different needs Versatile Application : Our cotter pins are not limited to a specific industry or use. They can be utilized in a variety of applications, including trailers, clamps, lawn mowers, trucks, and more. Whether you're a professional mechanic or a DIY enthusiast, these stainless steel R pins are an essential addition to your toolbox.