These Pintle Hooks are to be used with a drawbar with a 2-3/8" - 3" diameter eye and a ring thickness 1-1/4" to 1-5/8". Mounting holes are 6" side to side and 3-3/4" top to bottom and accept 7/8" Grade 8 bolts which are included. Rated 50 ton capacity, 20,000 lbs. maximum vertical load. Mounts to commercial truck body hitch plates only. Includes air actuator.