The Dritz Longarm Clear Acrylic Stitch Tool is designed to aid quilter in 'Stitch-In-The-Ditch' or 'Quarter Inch Stitching'. It is for use with a 1/4'' presser foot on traditional machines or for longarm machines with hopping foot that has 1/4'' between needle and edge of foot. Details: Clear 10.75'' x 0.5'' x 5'' Acrylic