This center line scriber is suitable for determining the exact position of the center of the board in the process of plate grooving, pin joint, assembly, etc., and can mark the center line and side line. The bottom features magnetism, the center line locator can be attached to the iron surface, and the pencil can also be inserted into the hole in the foot. This line scriber can mark the center of the plate with a thickness of 64 mm, move the scribe to draw 1/16 inch, 3/16 inch, 5/16 inch, 7/16 inch, 1/8 inch, 1/ 4 inch, 3/8 inch, 1/2 inch edge. suitable for plate grooving, pin joints, assembly work, making reference lines for drilling holes, marking out mortises and rabbets, etc. 100 x 60 x 50 mm/ 3.9 x 2.4 x 2.0 inches, this woodworking tool can quickly and accurately mark center lines on wood board up to 64 mm/ 2.5 inch, the diameter of the foot hole is about 7.2 mm/ 0.28 inch. Used to determine the exact position of the center of the board during board cutting, pin joints, assembly, etc.