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the illonois is 2.5 read the bottom description and the mac is a 3 inch strop. while either would work I have never heard of a mac I would opt for the illonois

Illinois strops are decent strops the 2.5 ones are the most used for straights. I used one till I made my horsehide strop and I just bought an old#2 heirloom 3inch from tony miller. never owned a tm...