Kai - Ultra Wheel Rotary Cutter 45mm

From the manufacturer:
The Kai RS-45 Rotary Cutter features a comfortable, soft-grip handle with a pressure-sensitive, 45mm blade and safety lock feature. It also has a universal grip for right or left handed use, as well as an easy change blade system, with no springs or washers to lose. The Kai RS-45 Rotary Cutter is one of the easiest blade change systems on the market. Most brands of rotary blades will fit our Kai rotary cutters.

Refill blade also available for purchase.