STURDY AND DURABLE - This hole punch is made of high quality material, durable, stable and never rust. The punch is polished and will not get blunt for long-term use. Dimensions - Suitable for 16/20/25mm diameter PE pipes with 3mm (0.118") perforations, correct sizing ensures that the sprinkler fits snugly against the pipe, minimizing waste. 2-in-1 Awl and Nipple Insert - Our irrigation tool kit for 1/4 dripper cone and nipple insert is ergonomically designed for easy handling. HOW TO USE - Simply press the tool onto the tube and remove the punch tool with the pre-punched hole on the left; insert the fitting into the tube, then slide the tube into the groove and push the fitting into the pre-cut hole Package: You will receive 1 professional punch, 1 2-in-1 punch and accessory inserts. Good tool for gardening and irrigation, enough for your daily use.