Description Are you looking for a professional, yet affordable Chain Adjuster? Are you in search of a sturdy, trustworthy tool that can do multiple works at once? If yes, look no further! Our professional chain adjuster must meet your needs. It is one of the best choices for you. The product used for regular electric bike such as fixed gear, commuting electric bike etc. Features -Color:Black -Material:Iron, Plastic -Size:8.00X5.20X4.20cm/3.14X2.04X1.65in -As tightness adjust bolt for electric bike chain. Constructed by reliable material, firm and durable in use. -The Chain Tensioner adjuster is for better tightening. Adjust chain tension to improve riding efficiency. -The product used for electric bike. Simple and easy to install, increase the service life of electric bicycles. -Beautiful appearance and sturdy, durable material. Easy to install and carry, small size and portable. -Perfect for strength, durable. Easy to install and competitive price. Made of reliable material, long-lasting, electric bike Chain Tool is practical and reliable. The Chain Tensioner adjuster designed with and very durable and easy to install. The product widely used in tensioning chains and preventing rear wheel slippage. This is great because it can prevent chain slack, electric bikes and any single electric bike. The chain tensioner adjuster suitable for electric bikes with rear entry drop-outs. You also can use it easily.