The Hozelock Micro Irrigation Hole punch is an essential tool for putting together your automatic watering system. It features a sharp point, designed to easily penetrate through the wall of your 13mm supply tube. These holes are required to insert 4mm tube or drippers/microjets. It can also be used to screw adaptors/connectors into your 4mm micro tube. Once firmly screwed into place, the adaptor can then be pushed into 13mm tube, connecting your supply tube to your micro tube.