CASE IH International Tractor Hair Pin Clip Linch Retaining PN# 198121A1 These are used to hold the clevis pins in the factory 3 point hitch check chain assemblies. These are used on trucks tractors construction equipment and are easily removable without tools. These sell for over $10 each at the dealer so save here These also have universal uses and measure 2.7″ overall length .15″ Wire size work perfect on 1/2″ 5/8″ and 3/4″ Clevis pins. Very high quality Save here with FREE shipping R3B4 10234