Bike Crank Bolt, 2 Pcs Aluminum Alloy Mountain Bike Crank Bolt 18mm Bicycle Crank Arm Fixing Bolts Crank Cover Screw Cap for Prowheel Hollow Integrated Crankset 1. Highstrength aluminum alloy material, fine workmanship, high hardness, not easy to deform. 2. Surface adopts anodic oxidation treatment, with bright color, corrosion resistance. 3. The second smoothly treatment, the fine craftsmanship, makes its personality shine. 4. Used to fix the the crankset and crank of the chain wheel, necessity accessory for cycling. 5. The fine design with precise machining, fits crank perfectly and offers professional fixation of crank. Specification: Item Type: Bike Crank Arm Bolts Material: Aluminum Alloy Size: Approx. 18mm/0.7in Weight: Approx. 18.0g/0.6oz Quantity: 2Pcs Application: for Prowheel Hollow Integrated Crankset Package List: 2 x Bike Crank Arm Bolts