KOKUYO HA-S100 Retractable Utility Knife / Cutter Knife / Snap Blade come in various attractive colors and it is compact, easy to carry and fancy enough to be an addition in your pen case! The blade is refillable / replaceable. It is sharp and almost effortless when doing the cutting job. The front change type which can be easily replaced simply by inserting and removing a blade from the tip and a lock function capable of firmly fixing the blade. The design of the blade handle is cushioned to helps ease the holding of the knife itself for smoother cutting.