Dargan Retractable Knife has a zinc alloy handle and comes with 5 spare blades included. This robust knife has a button slider which allows the user to shorten or lengthen the blade instantly to suit the job required. When not in use, the blade is carried inside the handle body for safety. Changing the blade lengths allows wider usage for variety of cutting applications. This strong knife is suited to farming, workshop, gardening and household use.