Parameter Information: Material: Transparent Acrylic Angle: 0-360° DIY Supplies: Woodworking Plastic sheeting is used to cover the product to prevent scratches, so you could peel off the plastic before you complain about the scratches and the lack of transparency! : ）Features: The transparent center finder can helps to provide a clear view FOR drawing holes with corresponding, index marks for drawing circles. The round center finder compass has inch/mm double scales, with good light transmission and clear to read, not easy to get dirty or damaged. Easy to use: Simply tap a small nail or pin (not include) through the center hole, insert a pencil in your choice of diameter hole, and pivot around the center point to make your circle mark. Suitable for lathe work, arts, crafts, school projects,wood turners, rough and finish carpenters or use it anywhere you need to draw a circle. Product Weight : 200 G / 7.05 Ounces Product Dimensions (L*W*H) : 255*255*3 MM / 10.04*10.04*0.12 Inches Package Weight : 143.0 G / 5.04 Ounces Package Dimensions (L*W*H) : 260*257*5 MM / 10.24*10.12*0.20 Inches Retail Packaging: Yes, General Box Package Include:1x Round Center Finder Compass