Review on 🔩 SNUG Fasteners (SNG903) Pack of 8 Stainless Steel Knife Threaded Inserts for Wood, 1/4"-20, 0.500" Length - Improved SEO by Matt Nichols

These excellent thread inserts can be used in both softwood and hardwood. The threads are very sharp and after drilling a 25/64" diameter hole (or 13/32" in hardwood) it's easy to insert with a standard screwdriver. They are made from high quality stainless steel and can be used outdoors with better results than the brass or galvanized steel inserts I usually use. Note that they are .45" in diameter, which is larger than the .375" in diameter of the similar 1/4-10" threaded inserts. Therefore, it is recommended to use a 13/32 inch hole in hardwood. Some Hard Rocks may require a 7/16" bit, but this is not recommended unless you are very careful not to wobble the bit.