This Tile Scraping Head by Champion Chisel Works is a part of the versatile Sure-Lock Floor Scraper System. Special spring steel inserts keeps nuts tight until you need to change the blades. The nuts may be used over and over again. The tough stainless-steel blade resists cracking unlike the high carbon spring steel used on other systems. When pushed beyond its limits, it bends rather than breaks. Shanks, which are available to fit every electric demo and roto hammer plus oval and round collar pneumatic chipping hammers, are sold separately.