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When ordering lever binders or ratchet binders you will find that each size is determined with two measurements. Grade 70 transport chain is for objects being transported on a flatbed or other moving vehicle. Each binder can be used with either size of equipment chain for the appropriate application, but since the different grades have different load limits each binder will be marked with the appropriate chain dimensions for both types of chain for proper performance. The first measurement (smaller) identifies the Grade 70 chain dimension, the second measurement (larger) identifies the Grade 43 chain size required.

Example: 5/16" - 3/8" Lever Binders; the 5/16" specifies the chain binder can be used with 5/16" Grade 70 Transport Chain or it can be used with 3/8" Grade 43 High Test Chain (logging chain.) Small load binders can technically be used for both 5/16" or 3/8" chain in either grade, but if you pair this lever binder with 3/8" Grade 70 transport chain the binder will be weaker than the chain, making the binder the weakest part of the assembly. If you are working with 3/8" Grade 70 chain, the best option would be to pair it with a 3/8" - 1/2" Chain Binder so that the chain and binder are of equal strength. When choosing what grades of chain will go with what binders, be sure to consider both specifications.
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