Feature: 1. Aluminum Alloy Material: Bike crankset is made of aluminum alloy material, forging molding, fine workmanship, improve strength and rigidity. 2. High Strength and Flatness: Thickened four claws, single nail locking, high strength, high flatness, the teeth are installed flat and not offset. 3. Easy Installation: Bike cranks are easy to install and disassemble, you can directly replace the old or damaged parts to obtain higher strength. 4. Product Style: Crank black, central shaft, positive and negative tooth single disc 36T black. Crankset is compatible with 8, 9, 10, 11, 12 speed. 5. Applicable Model: 36T bike crankset fts most mountain bikes with hollow axles, effectively improve the performance of your bike, providing you great riding experience. Specification: Item Type: Bicycle Hollow Integrated Crank Product Color: Black Product Material: Aluminum Alloy Weight: Approx. 886g / 31.3oz Product Compatibility: 8, 9, 10, 11, 12 Speed Product Style: Crank Black + Central Shaft + Positive and Negative Tooth Single Disc 36T Black. Package List: 3 x Crank Assembly1 x Tooth10 x Screw Assembly