10l0l 18-8 Stainless Steel Nylon Insert Lock Nuts 5/16-18 Inch Kit (25) 15 years experience in the production of stainless steel fasteners Strong carry-corrosion, high temperature performance, strong anti-rust Package include:25 pcs 5/16-18 Nylon Nuts;1 pcs Hook Magnet(can holds up to 12 Pounds)