Use with a rotary cutter and mat to trim a BIG piping's seam allowance for handbags, pillows and home dec (like original Groovin' Piping Trimming Tool but with wider, deeper grooves). Accomodates cording up to 3/16" in diameter. Trims seam allowances to 1/4" or 1/2". designed for right- or left-handed use. Complete instructions for making perfect piping and using the tool included.