The STANLEY® INTERLOCKING® Retractable 18mm Snap-Off Utility Knife 
features 1 blade with 8 cutting segments for a longer life span and an 
interlocking nose design for improved safety, securing the blade firmly 
in place and preventing nose spread and body separation that might 
otherwise cause blades to break-loose and cause injury. Its tough and 
solvent resistant die-cast metal body and blade wheel lock is ideal for 
heavy duty cutting, and its multi-position retractable blade for 
versatility, control and safety, makes it suitable for all types of 
professionals and home improvement jobs.