Removes wallcovering or scrapes paint and stickers from glass. #33170 blade indexes in head for proper positioning and no slipping. Double locks for positive blade hold. Change blades without tools by pressing to release clamp. Fully reversible (left or right) angled head and long ergonomic handle for power and reach. Glass-filled nylon construction will not rust or corrode. Use 4 in #33170 or 33160 blades.