E-Z Lok Threaded Insert, Brass, Knife Thread, 5/16"-18 Internal Threads, 0.625" Length (Pack of 10) Provides a Strong Machine Thread In Hard Woods Ideal For Use in Woods Like Oak, Cherry, and Maple Designed For Use In Furniture, Cabinetry, Storm Windows and Marine Applications Simply Drill the Appropriately Sized Hole and Install with Screwdriver or Optional Drive Tool Proprietary External Knife Threads Provide Superior Holding Power