The Tech Team Locking Ring Linchpin can be used to secure 3-point hitches and axles. They are a secure and long-lasting alternative to R-clips in most applications. The pins have a quick-release locking ring that stays attached to the pin. The clips are made from durable steel construction with a yellow zinc dichromate finish for corrosion resistance. The pins are 1/4" in diameter and 1 1/2” long, and the locking rings are 1.65” in diameter and .12” thick. The set includes five (5) linchpins.