About this 3D model

This tool helps find the center of any material/object. Place the tool on the material and twist the tool until both rounds meet the material either side. Then use a pencil to mark the point ( run the tool up the material to give you a line). Order a Set of 3 Different Sizes http://ebay.us/y3sc1W?cmpnId=5338273189 3D Printing Service on eBay http://ebay.us/8ngnBM?cmpnId=5338273189