Luna Breakable blade knife, very durable, with zinc alloy body and soft ergonomic rubber parts for easy use. Dual blade function. The front button pushes the blade 15 mm forward, it has an automatic return spring; The knife is perfect for opening packages and other fast cutting jobs. Use the rear button to push the blade to the desired distance. The plastic back cover can be removed and used as a breaking tool for new blades. The set includes SK2H blades. Hole for fastening.