Upgrade your Wing Nuts on your Back-Plate with these Corrosion Free Delrin Speed Nuts. Nuts are Precision Machined from Durable Delrin Material and help prevent Stainless Steel to Stainless Steel Galling. They are a Strong, Durable Alternative to the Traditional Wing Nuts. The Speed Nuts have Knurled Gripping Surface for Easier Disassembly even if you're wearing gloves.