Removes sharp edges quickly & safely. Simple, practical and safe while preparing glass for foiling or lead. Size: 3.75" x 1.75" x 1.25" Two extra-fine stones work in parallel to refine both glass edges, further enhanced by a patent-pending notch that allows The Edger to reach into the tightest inside curves. Just one pass along the glass edge is enough to smooth out and eliminate dangerous, razor-sharp protrusions. Works with all glass types. Glass thicknesses of 1/16" to 1/4" (1.6-6.4mm)