Deformation- design: Our metal heels feature a tapered design with thin front ring openings for easier nailing into wood.The reinforced impact ensures that the nails are not easily deformed. Anti-slip thread: The middle is designed with anti-slip thread. Once installed, our wedges firmly grasp the wood to that they not slide off easily during use. Quality Materials: Our metal heels are made of high-quality steel and are .It effectively supports a variety of wood structures and provides safe installation without loosening or falling off over time. [Multifunctional Compatibility] This metal wedge is suitable for hammers, axes, axes, sleds and other wooden handle tools, and is a multi-functional complement to the toolbox. 3 Universal Sizes to Choose: Set includes three different sizes, 8mm (0.31 inches), 10mm (0.39 inches) and 12mm (0.47 inches) in diameter, to meet all kinds of needs from to a big hammer. Colour:Silver Material:Metal Package Contents: 21 * Hammer Handle Wedges Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.