Features： 1、The double bridge type chain can improve the tensile and torsion strength of the chain, and the speed change is agile and smooth. 2、The chain is fully electroplated, made of high quality carbon steel, quenched and heat treated to enhance wear resistance, rust and corrosion resistance. 3、The chain waist adopts chamfer design, the tooth tip and the chain piece quickly bite, the stability and safety of the chain are greatly improved. 4、Strengthen the embedded axis, high rigidity strengthened structure, compact, flexible and not jammed, withstand high pedaling force. 5、The chain comes with a hook and loop buckle, which can be installed quickly without tools, and it is safe to install with tools. Specification： Item Type: Bike Chain Material: Carbon Steel Specification: 116 Sections 1/2in x 11/128in Speed: 12 Speed Application: 12 Speed Flywheel Hook and Loop Buckle: A Pair of Standard Buckles Features: High Strength Alloy Chain Pieces Are Used to Increase the Strength and Service Life of the Chain, the Concave Pin Shaft to Increase the Interlocking Force of the Chain Pins, Lightweight Structure and Agile Speed Change Performance Package List： 1 x Bike Chain 2 x Hook and Loop Link Block