Flawlessly measure hem lines. The moving curser locks into place at 1/8 inch intervals up to 6 inches. Measure from the top of the “T” to the top of the locking curser for perfect hems every time. Mark seam allowances. The 5-in-1 has convenient markings for standard seam allowances or your set your own. Create perfect circles or arcs. The right side of the gauge is marked in inches from 0 at the pivot point up to 6 inches at the top. Hold the pivot point with Clover's awl and insert a marking pin int9506 Slidiing gauge_image2o the locking curser set at the desired radius and swing for a perfect arc or circle. The “T-Square” feature of the 5-in-1 Sliding Gauge allows you to measure both length and width at the same time. You can also use it to set perfect right angles in any sewing project requiring square placement.