Irwin Vise-Grip Utility Knives

Both a retractable and a folding utility knife are used for optimized cutting angles and reduced fatigue. The screw in the knife attaches to the casing to prevent the blade from coming loose and the inside of the blades hold multiple blades for back up when one goes dull. The main difference is that the folding knife can be folded and put away in a smaller size, whereas the retractable knife is only capable of pulling the blade back in. It also holds more blades than the folding knife.

Any of the Irwin Vise-Grip blades will fit in to your Irwin Vise-Grip utility knife. It depends on how many blades you are wanting total that will be your hardest decision.