These motors seem great, one of them wouldn't spin, I opened it up and discovered it was 50% of the Magnet on the N pull side, chipped and attached to the S pole side. I had to secure it back, waiting upon response from seller if they will send 2 replacement Magnet sleeves.UPDATE ON 04/11/2020 :: Contacted seller, recieved a prompt/hassle-free response. I verified my issue with pictures with a brief explanation that the Arc Magnet was broken. The seller contacted me the day after, stating they would send a replacement. Today I recieved the replacement shipment.I highly recommend these motors, powerful and versatile. You can do some very inexpensive upgrades with just a Philips screwdriver and a few dollars to spend. This seller has made my unfortunate situation recieving a damaged product & promptly made it right!Thank You Boboran\BestEquip