If you need a spare nut or a screw link wears out please contact us for a replacement. If you have a specialty request we may be able to assist. M!C, Inc. 7001 W. 24th St. St. Louis Park, MN 55426 952-512-1532 Nonconforming Goods OR Dissatisfaction with product: Inspect the device when you get it, If the product is not to your satisfaction notify M!C, Inc. within thirty (30) days of delivery and tell us what’s wrong, along with the product code from the device label. Seller and M!C, Inc. shall not have any obligation to repair, replace or otherwise compensate Buyer for nonconforming goods if Buyer fails to notify Seller that goods are nonconforming within thirty (30) days of Seller’s delivery of the goods. You must send the device back to M!C, Inc. in order to obtain a refund at the original listed price or to get a replacement.