You hold the knife similar to how you hold a pencil by cradling your finger and "drive" the knife with your thumb and middle finger.
So far we have three types in stock, the first is the basic.
DT Heidi's review on this tool:"I have been craft knife challenged until now. You put your index finger in the loop handle and just point and cut. It swivels around corners and curls around bends with no hopping, rolling or slipping. Best of all very little pressure is required."
Next is this rotary blade, the tiny rotary blade glides smoothly wherever your finger is pointing, to easily cut the thinnest and most delicate papers
Last but not least is the swivel blade, is ideal for cutting intricate designs and flowing shapes.