Hitch pins come with a round swivel handle and a locking yellow Duro-Plated bridge pin.  They are heat treated for corrosion protection and may be used for most equipment applications.   Sized by diameter (1/2"), length under the head to bridge pin or effective length (4"), and length under the head to end of hitch pin or overall length (4  3/4").  The most common application:  trailer, turf, and agricultural.