Dolphin Knife complete with holster is the most popular type of carpet fitters and hard floor installers knives. It is both light and strong has a quick blade changing mechanism by using the thumbscrew wheel and is designed to open in just three revolutions a rear hinged mechanism allows for quick blade replacement and there is nothing to realign when closing. The internal blade storage compartment holds up to 10 blades. Made from high grade aluminium and finished to a polished nickel finish.