Specifications High-concerned chemical:None Model Number:55pcs DIY Supplies:Metalworking Origin: China Item Type:Pins p{margin-block-start: 0; margin-block-end: 0} 55 pieces in 6 sizes The opening clip combination kit has 6 sizes. The five hook pin sizes are M1.5x28 (20 pieces), M1.8x32 (10 pieces), M2x30 (10 pieces), M2.8x50 (5 pieces), M3x65 (5 pieces), M4x75 (5 pieces). The hair clip set includes various sizes M1.5-M4, with a wide range of sizes to meet the needs of different purposes. The R clamp fixing pin is made of high-quality 304 stainless steel. Open mouth pins are suitable for indoor, outdoor, and high-temperature, high salinity working environments. Due to its strict metal composition and sophisticated casting techniques, this hanging pin clip features high hardness and strong spring tension. When the clip is in place, it is not easy to remove the pin. Moreover, once these products are in place, they will be long-lasting. Hair clip design: fast, safe, and effective locking bolt, uniform force, not easy to slide, used to prevent relative travel, will not fall off, easy to install and disassemble, and can be reused. Perfect Open Mouth Pin Replacement: Replace connecting pins on most devices, which are necessary for replacing trailer ball pins, push-pull pins, retaining pins, towing pins, tractor pin clips, trailer pin clips, and manual truck pin replacement parts. Suitable for various machinery, tractors, agricultural equipment, engines, trucks, cars, campers, lawn and garden equipment, etc. You can upgrade all tractor and truck hitch devices. Reusable storage box: A good plastic container with a lock for storage. All R clips are packaged in a delicate transparent box. Needle clips are arranged according to size, making it easy for you to store and find the size you need.