2 Set Outdoor sports tools: 1 Set x Crank & 1 Set x BrakeStylish and cool appearance, made of high quality aluminum alloy, durable, and light weight. The kit comes with everything you need - one pack install tools. What you need to do is to install these on your mountain bike.Brake pad is wear-resistant, which can prevent wheel rotation. Easy to install, adjustable, very suitable for cantilever brake. It can stop immediately, you can stop the bike immediately, which will save your life in an emergency.This product is suitable for retrofit folding bike, city bike, electric bike. lightweight, high axial strength and compatibility. Standard precision machining, ensure chain retention, increases service life, and reduces friction.A good replacement for bike repair and upgradation, compatible with many bike models. 170mm crank arm length without any overlap of crank arm and chain ring bolt.colour: silver+blackMaterial: aluminum alloyBrake:Condition: 100% brand newWeight: Approx. 336gsize: 12.7x2.6cmCrank set:Specifications: 48TBED double cover x 170MM handle square hole, with 9/16inch pedal axle, chain cover,Introduction: Compatible with 6/7 speed post change, installation recommendation: suitable for trendy lithium battery/bicycle type lithium battery/bicycle etc.Package Contents:1 x Crank set2 Pair x Brake1 x Pack AccessoriesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.