Metal detectable safety knives keep the blade concealed or retracted to protect the operator, inside a detectable body that can be found if the knife is lost on the line. In fixed blade safety knives, choose the Penguin 900 or Fish 200 for strapping, tape and stretch film, the Swan bag cutter for ingredient bags and sacks, or the Boxer 700 for boxes and cardboard. In retractable safety knives, the ReAkta self-retracts when it senses it has been dropped or jerked, the Mascaret uses a trigger, the Profi a thumb slide for left or right hands, and the Smartcut is the most economical. For prep work, see detectable kitchen knives and scissors, or browse all metal detectable knives. Verify your line with metal detector test pieces, or request a sample.