The Faithfull Professional Lock Back Utility Knife is a pocket-sized, compact folding knife. It features an ergonomic aluminium casing with a durable zinc alloy blade holder and quick-release blade change. The folding blade holder allows the blade to be securely stored inside the body of the knife but can be easily pulled open and locked in place ready for use. After use, a simple press on the release lever allows the blade to be returned into the body of the knife for safekeeping. Changing the blade is carried out by pressing the side release button on the blade holder and then pulling the old blade out, the new blade can then be simply slid into position ready for use. The blade holder also incorporates a useful thumb pad for precise pressure control when cutting. The compact size and the light weight of this knife make it ideal for storing in your pocket, but it also has the added convenience of a belt clip. This knife uses standard trimming knife blades that are readily available. Specification: Folded Length: 110mm. Open Length: 170mm.