Replace damaged or worn safety chains quickly and easily. Sierra Pacific Engineering and Products offers forged steel weld-on safety chain retainers in 2 sizes. Part number D388 is the large retainer for 3/8” chains and has a breaking load capacity of 25,000 lb. Part number D387 is the small retainer for 5/16” chains and has a breaking load capacity of 10,000 lb. Please contact us at www.SPEP.com for more information.