Powerful, ergonomically superior aluminium staple gun for demanding, professional applications and precision operation. High performance and long working life allow it to be used regularly. Other features include a 2-step force adjuster, which can be set to reflect different types of material and the length of staple being used. The ALU840 is suitable for many tough jobs including fastening thinner boards or Masonite or material such as insulation, damp proof coursing, plastic wrap, cardboard, or other items that demand high levels of fastening.