The staple type parameter specifies which specific type and shape of staples is intended for the given stapler model. Each stapler is designed for a certain standard of staples and using a different type can cause the tool to jam or become non-functional. There are different types of staples for different purposes. Flat staples, also referred to as thin staples, have a wide back and are suitable for attaching materials where it is desirable that they do not break, such as fabric, foil or cardboard. On the other hand, narrow clips have a smaller back which makes them less visible after application. They go deeper into the material and are often used when working with wood, for example to attach decking, mouldings or furniture backs. A special type is the rounded-back cable clips, which are used to securely fasten low-voltage cables so as not to damage their insulation. The type designation itself, for example "Type 53" or "Type 140", is a standardised code that defines the exact dimensions of the clamp - the width of the spine and the thickness of the wire. For proper operation, it is always necessary to use only the type of staple specified in the manual or directly on the body of the stapler. Within one type, there are different staple lengths, which are selected according to the thickness of the material to be attached.