OLFA - Quick Change Rotary Cutter 45mm - Simply release the blade by sliding a locking mechanism on the back of the handle. No more washer and no assembly. Innovative split blade cover takes the effort out of switching from right to left-hand. Anti-slip, rubberised grips on both sides of the contoured handle, providing secure, comfortable handling. Cuts up to 6 layers of fabric. Includes RB45 blade. Fits RB45 blade.