Aluminum Alloy Material: The crankshaft bolt is made of high-quality aluminum alloy material, with precision strength far superior to plastic screws. Good quality provides a longer lifespan
Adaptable Model: This product is used to fix the crank and crank of the sprocket, M20 is suitable for SHIMANO kits (M4000/M590/M596/M661/SLX/XT/XTR and other integrated dental discs)
Easy to Install: The crankshaft screw is easy to install, and you can use an English 3/8 hex wrench to install the crankshaft screw
Size: The thread diameter of M20 crank arm screw is 20mm, the thread height is 9mm, the inner hexagonal hole diameter is 10mm, and the top diameter is 28mm. Please check if it is the required size.
Product Satisfaction Guarantee: If you are not satisfied with the product after receiving it, you can contact us at any time for replacement or refund