Koch 7725010 Roller Chain Breaker, #25 to #60 and Koch 7441100 #41 Roller Chain review. ANSI size 41 has 1/2" pitch and 0.25" inner width. Comes with new master link. It comes apart easily with the breaker tool. Standard roller chain meets ASME/ANSI B29.1 standards. This long life chain will work with standard sprockets on agricultural and industrial equipment.

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