Dutton-Lainson Dutton Lainson 22105 Safety Chains Model 6254 1/4in x 36". Zinc plated finish to resist rust with heavy steel hook and safety clip that latches to keep chains attached to tow vehicle. Features a chain size of 1/4" and mounts with 7/16" hardened (grade 5) bolts. This product meets SAE and V-5 standards. Two 36" chains are included per package. NOTE: Do not mount chains to trailer tongue with the same bolts used to mount the coupler. Cross safety chains under coupling allowing only enough slack for turns. Features of Dutton-Lainson 5221056 Dutton Lainson 22105 Safety Chains Model 6254 1/4in x 36" Heavy duty Class 3 welded link chains For trailers up to 5000 lbs. 1/4" chain size Mounts with 7/16" hardened (grade 5) bolts Two 36" chains per package Package Contents: Dutton-Lainson 5221056 Dutton Lainson 22105 Safety Chains Model 6254 1/4in x 36" Dutton-Lainson 5221056: Dutton Lainson 22105 Safety Chains Model 6254 1/4in x 36"