We used to run Tsumura"s in a commercial setting before changing to Sugihara ( Cash incentive) both have proved excellent for wear rate ( lack of ) & quality of manufacture. a tiny problem we had with the Tsumura"s, a couple of them, the very end where the chain enters were a bit "pinched" & chain was a little tight easily fixed by a tiny V"ing out of the groove other than that a top quality piece of kit from both company"s