This multi-purpose tool is perfect for trimming any quilt-as-you-go blocks. Our 4 ½” x 12 ½” acrylic ruler has a sturdy crimped aluminum edge. This edge is used to protect the quilt block front while trimming the bulk underneath. Use the Trimmer By George 3.0 to cut the perfect size sashing and binding for your HoopSisters EmbroidaBlocks. 60mm ROTARY CUTTER REQUIRED. Special Note: The Trimmer has printed on it, a 60mm rotary cutter is recommend, please adhere to this recommendation to keep your trimmer at its best. Use the crimped side to trim the Battilizer™ and backing from the block edges just like the original Trimmer by George!™ Then, flip it over and use the clear acrylic ruler side to trim the blocks 1/4 inch from the basting line! There is even a handy guide to cut your sashing and binding. One tool for all your EmbroidaBlock trimming needs.