AUTUY Aluminum Locking Core Contour Gauge:\r\n\r\n our contour gauge duplicator goes with Aluminum locking Core mechanism,compared with ordinary lock core, easy to use,good material, high precise shape duplication, wide application for winding pipes, circular frames, ducts and many objects, Ideal for fitting tiles, laminate, carpet, checking dimensions, molding.\r\n\r\n\r\n\r\n\r\nWHY CHOOSE AUTUY CONTOUR GAUGE? \r\n\r\n Aluminum Locking Core :\r\nour contour gauge duplicator goes with Aluminum locking Core mechanism,compared with ordinary lock core ,our contour duplicator lock tighter ,completely solve the problem of looseness, fixing and imprecision,which will help you better to duplicate and transfer the shape accurately to anywhere you need.\r\n\r\n Precise Shape Duplication:\r\n Our contour duplications gauge made of upgrade ABS plastic,high density and smooth, which will provide more druable and sturdy construction to keep long time using, it is a nice tool to make your work more convenient and improve your work efficiency.\r\n\r\n\r\n\r\n\r\nSpecifications:\r\n -       Pack of 2: (1x 10” Red and 1x 5” Blue)\r\n -       Material: Aluminum core with ABS body and lock\r\n -       Dimensions: 5\'\' & 10\'\' Length ,capable to measure upto 2.5” of depth.\r\n\r\n\r\n\r\n\r\nHow to use it?\r\n\r\n 1.   Check the gauge pins if they are too loose or too tight for your taste.\r\n 2.   Adjust the pins by simply tightening or loosening the screws located at top of the gauge.\r\n 3.   Place the gauge next to the shape/object you want to copy. Move the individual pins to precisely copy all the corners and bends of the shape.\r\n 4.   Lock the contour gauge to preserve the shape you copied.\r\n 5.   Place the gauge on the object you want to copy and trace it with pen.