Compression and wear resistance Hammer head removable and replaceable Features: Multifunctional DIY Supplies: Tiling Rubber Hammer Jewelers Metal Mallet Professional leather craft and jewelry mallet. Hammer head diameter: 25mm, 30mm, 35mm, 40mm Material:Nickel-chromium alloy steel colour:Black + yellow Package Contents: 4 * double-sided soft rubber hammersOnly the above package content, other products are not included. Note: Light shooting 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.