Description:1.Brad Hole Tee Nuts insert steel threads onto the wood. They contain brad holes and must be attached by using small brad nails. Tee Nuts are designed to leave a flush surface in both hard and softwood. The nuts offer a flat base with prong projections running parallel to the barrel.2.Rated for both indoor and outdoor use. Designed primarily for wooden furniture.3.Mounting screws are not included. SPECIFICATIONS:Product Name: Tee NutMaterial: Carbon SteelStrength Grade: 4.8Finish: Zinc PlatedDimension: 17 x 37mm / 0.67-inch x 1.46-inch (Total H*Base D)Female Thread Diameter: M10Round Base Thickness: 2.5mm / 0.1-inchDrill Hole Diameter: 13mm / 0.51-inchMounting Hole Diameter: 5.5mm / 0.22-inchMain Color: Bronze Tone Package Content:10pcs x Tee Nut.