ProKnee’s Goof Proof Wall Trimmer features several patent-pending features, including an automatic blade depth adjustment stop, threaded steel inserts/hardware and molded plastic frame components for extra strength. Designed to trim soft sheet goods easily and create professional cuts in under 60 seconds, the tool uses standard slotted blades and cuts the cove base toe and direct glue-down or inflexible carpet in one pass. The Goof Proof Wall Trimmer can be used with either the left or right hand.