The Prima Comfort Craft Knife is an excellent choice for crafters. Developed by the talented Ingvild Bolme for Prima Marketing Inc.This Comfort Craft Knife features a soft and ergonomic grip that is suited to comfortably fit your hand making it easy to use- just like writing with a pencil. Designed for detailed and controlled cutting and maximum comfort during hour after hour of crafting. The top of the handle pulls off to reveal a storage area that has room for up to 10 extra blades to be stored . 4 extra carbon blades included are included in package. Replacement blades are sold separately. Package contains 6 replacement blades.