Bike Crank Arm Left Available 170mm Square Diamond Hole Allow Low Profile Cap Tool, Bike Crankset for Road Bike, Mountain Bike, Folding Bike, Fixed Gear Bicycle 36V/48V BBS01/BBS02/BBS03 (Black)

Horrible. It is marked as aluminum and it's just hard plastic with aluminum inserts for the pedal hole and the spindle hole. I guess it would be good for a beach cruiser, if you can get it to stay on. I had to press it on, tighten the nut very hard with a lot of locktite and it still managed to become loose because after light riding the inserts ended up splitting from the plastic. Spend a little bit more money on another option if not just converting to a newer style crankset

Took this product to the bike shop for installation and they said it was not built correctly and i should return it for a refund.