Features: 1Aluminum Alloy Material: Made of selected aluminum alloy material, CNC cutting, anti corrosion and wear resistant, sturdy and durable. 2High Accuracy and Strength: The tooth pattern standard will not cause threads of different thicknesses, and the accuracy and strength are far better than the original plastic screws. 3Lightweight Design: Crank cover has been designed many times to be compatible with strength and light weight, making your riding easier. 4Scope of Application: The screws are suitable for M400, M590, M596, M661, for SLX, for XT, for XTR and other integrated crankset road bikes and mountain bikes. 5Bike Great Accessory: Good processing with good texture can ensure a long service life. Bike crank fixing bolt is a great accessory for bicycle enthusiasts. Item Type: Bicycle Crank Arm Screw Product Material: Aluminum Alloy Weight: Approx. 14g / 0.5oz Product Diameter: Approx. 2.8cm / 1.1in Package Included: 1 x&nbspCrankset&nbspArm&nbspBolt