The Klein Tools 44136 Self-Retracting Utility Knife combines the features available in a utility knife, with rugged construction and user safety in mind. This tool has a bright yellow handle for easy visibility and safety. When the blade is extended and pressure is applied to a hard surface, then removed from the surface when cut is complete, the blade retracts automatically and fully into the housing for user safety. The knife uses standard replacement utility blades, (44103 and 44101). Lanyard hole keeps the knife safely tethered to protect from loss of knife or injury from dropped knife.