Keep your equipment secure with BYSOL's heavy-duty hitch pin clips. This 10-piece set of M4x90 (4 black and 6 silver)steel R-clips provides reliable retention for machinery and tractor attachments. These spring retaining wire pins, also known as cotter or hair pins, are designed for durability and dependable performance. The versatile assortment offers quick and easy installation while maintaining a strong hold to prevent accidental detachment. Perfect for automotive, agricultural, and industrial applications where secure fastening is crucial. The sturdy steel construction ensures these pins can withstand demanding conditions while the silver finish adds corrosion resistance. Each pin features a practical design that allows for repeated use while maintaining its spring tension. An essential hardware component for anyone working with equipment that requires reliable pin retention.