10 PCS Square Pto Pin Shaft Locking Pin 1/4 pin Hitch pin Wire Lock Pin Safety Coupler Pin 1/4″ x 2-3/4″for PTO,Farm,Lawn,Hitches,and Garden (10 PCS Trailer Pins). 【Application】The shaft locking pin is for farming, gardening, truck, boat, trailer couplers, trailer jack wheel, PTO accessories or other locking applications.