"This practical tool combines the best features available in a utility knife, with rugged construction and user safety in mind. It has a bright yellow handle for easy visibility. 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, Cat. No. 44103 and 44101. Lanyard hole keeps the knife safely tethered to protect from loss of knife or injury from dropped knife."