Designed for easy, safe blade change. our easy change ergo control rotary cutter features a unique design that makes it easier than ever to change the blade without sacrificing cutting/trimming performance. a magnet built into the blade housing lets you remove the dull blade and quickly add a fresh blade. this also simplifies assembly so you don"t have to remember the order of washers and nuts. other innovations include a slim design that offers right-and left-handed users a clear line of sight, a precision-ground blade with titanium coating for lasting sharpness, a blade guard that retracts when you squeeze the trigger, a thumb lock to lock the blade open for continuous use or closed for safety and a longer, more comfortable ergonomic soft grip handle to help reduce hand fatigue. replacement 45 mm rotary blades available (itemno. 01-005872, titanium). five-pack of replacement 45 mm rotary blades available (itemno. 95287097, non-titanium). lifetime warranty.