From Olfa

Add some pizzazz to your rotary cutting! Contoured handle allows for comfortable cutting. Quick blade change. Integrated grooves at the head of the cutter help prevent finger slippage. Blade cover for additional safety. One blade included. Accepts all OLFA 45mm blades. 

45mm Quick Change Rotary Cutter has an innovative single click blade change for easily changing your rotary blades. The contoured handle with integrated finger groves, and easy to use blade cover is great for both right and left hand users.