This is a A-159425 Check Chain Stabilizer PN: 159425Main Description As Following : A-159425 Check Chain Stabilizer P.N: 159425 Fits most compact tractors 15 HP to 40 HP.Adjustable: 24" - 27"Body Length: 4.250"Pin Diameter: 7/16"Thread: 1/2-20 Crossed From: 873-159425 , Found in Section & Models : Hitch & Drawbar Parts > Stabilizer and Sway Block Parts, (Miscellaneous) (UNDEFINED): SEVERAL (Compact Tractors 15 HP To 40 HP), Yanmar (UNDEFINED): SEVERAL, Hitch & Drawbar Parts > Stabilizer: Kits, Assbly, Arms, Pins & Check Chains, (Miscellaneous) (UNDEFINED): SEVERAL (Compact Tractors 15 HP To 40 HP), Yanmar (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Adjustable: 24" - 27" Body Length: 4.250" Pin Diameter: 7/16" Thread: 1/2-20