Front Pin: 55mm diameter x 12 3/8inch long, with 7/16 inch through holes at each end. Rear Pin: 50mm diameter x 12 3/8inch long, with 7/16 inch through holes at each end. For use in John Deere 310 SG, 310 SJ, 310 SK, 310 SL, 310 TJ, 315 SL, 410 G, 410 J, 410 K, 410 L. To use in attachments when using quick coupler. Not for use to mount pin to machine. Made in the USA from USA-made steel.