Tpfocus Reflection Line Board Dent Detection Auto Body Paintless Dent Repair Tools Dent Repair Line Board with Adjustment Holder Yellow Detection tool to confirm the exact position of dent for autobody paintless dent repair.Reflection becomes distorted where the dent is,and the distorted image will become parallel after the dent is successfully removed. Requires plenty of light to work well. Simple operation,easy to control. Dimension:300x210x3mm.Material: Plastic. Package included:1pcs Paintless Dent Repair reflection line board with adjustment holder.