The Alivio/Acera/Altus shifter and brake lever left integrated (3) st-ef51 is another outstanding addition to the Shimano family of products. Shimano is the #1 brand in cycling parts, especially Shifters, derailleurs, sprockets, and brakes. Shimano non-series components might be better called all-series due to their versatility. Cassettes, brakes and cranks etc. From the non-series components work as well with the Deore as they will with Tourney. Since 1921 Shimano has produced the world’s finest bicycle parts. Precision shifting, with a look all their own, Shimano has earned a reputation for the best products at all price points. Shimano delivers products that are innovative, industry leading, and perform up to the world class reputation that Shimano has developed over the decades.