Made of aluminum alloy, practical and wear-resistant, has a long service life. Can draw an arc with stainless steel rollers. With incisive and smooth tungsten steel blade. Easy to use and measure, high precision, more professional. Can hold pens of various sizes, suitable for wood, ceramic, iron, acrylic, etc. Features: Material: aluminum alloy Color: silver Total length: 180mm / 7.1in Item weight: 420g / 0.9lb Package size: 200 * 60 * 60mm / 7.9 * 2.3 * 2.3in Package weight: 450g / 1.0ln Package List: 1 * Linear Arc Processing Tool For Woodworking Note: It does not include other things, color is based on the first picture, and other pictures only show effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to the manual measurement. Please allow deviation. Thank you!