If you’ve never had occasion to use a 3mm Green Hole Punch you might not be familiar with its usage. Essentially, if you are customising irrigation tubing, you are likely to need to punch 3mm holes in it in order to house the nipple or nipple tee, allowing the down tube assembly to be inserted. Irrigation pipes are usually manufactured from lower density polyethelene (LPDE). However, these are high precision drip pipes manufactured according to the British ISO 9261:2004 standard and specifically used for irrigation purposes. The 3mm Green Hole Punch has a hollow metal tip and is ideal for this purpose.