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. Create perfect circles or arcs. 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.