DeckWise Hardwood Extreme Plugs create a fastener-free deck surface. Made from real hardwood and tapered for easy installation. These hardwood plugs are perfect for starter boards, end boards and stairs when using a clip system such as Ipe Clip Hidden Deck Fasteners. Plugs install easily in pre-drilled and countersink holes with Gorilla Glue. All protruding plug material can simply be hand sawed or sanded off for a smooth, flush finish. Most holes are not drilled perfectly round because the hand held drill wobbles during use creating an oblong hole. The tolerance-absorbing rings that go around each plug fill in these oblong holes and also provides more surface area for glue to hold.