This line magnifier makes charts and small print easy to read. Sliding markers highlight your work area. Simply position the line magnifier in place using the handy red line as your guide. Use the two sliding markers to identify your work area. Tighten markers by removing and then pinching each angled side. Loosen markers by removing and then pulling apart each angled side. Details: Clear 6.5'' x 1'' 1 count Has two sliding markers