Features 1、Aluminum Alloy Material: Made of selected aluminum alloy material, CNC cutting, anti corrosion and wear resistant, sturdy and durable. 2、Exquisite Workmanship: The tooth pattern standard will not cause threads of different thicknesses, and the accuracy and strength are far better than the original plastic screws 3、Lightweight Design: Crank screw has been designed many times to be compatible with strength and light weight, making riding easier. 4、Scope of Application: The screws are suitable for hollow one piece crankset, for FSA crankset and the old for FC‑4500 and for FC‑5600 road cranksets and other road bikes, mountain bikes. 5、Applicable People: 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. 12g / 0.4oz Product Size: Approx. 2.8cm / 1.1in Package List 1 x Crankset Arm Bolt