[Premium Material] These Locking pins are made of spring steel and carbon steel, zinc plated to resist rust and corrosion,suitable for outdoor long-term use. [Standard Size] The trailer pins has a diameter:6.3mm/1/4 inch;Pin length:70 mm/2.75 inch(2-3/4 inch).suitable for a of trailer connectors. [Simple Design] When removing or using it,all we need to do is open or close the spring-loaded 's got a nice safety latch it's gonna come around it and hold it in place,you don't have to worry about it popping out. [Application] The shaft locking pin is suitable for farming, gardening, truck, boat, trailer couplers, trailer jack wheel and locking applications. [Compact Solution] This hitch latch pin provides a reliable solution for keeping the coupler latch intact with the trailer ball Colour:Silver Material:carbon steel Size:Diameter:6.3mm, rod:7cm Package Contents: 30 * Trailer Lock Pins Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.