Material: The black drill bit of drip tube hole punch is mainly made of high quality metal with anti-rust coating, which is non-corrosive and durable, the handle is made of durable plastic, which is sturdy and long lasting use.Size: The punch hole measures approx. 3 mm/ 0.118 Inches, proper size can make sure that the pressure in the drip system is suitable and won't waste your materials.2-In-1 Punch and Fitting Insert: The irrigation hole punch tool kit is suitable for both drip tubing punch and 1/ 4 fitting insertion use, it can help to punch the proper hole for easier operation.Application: Two-in-one dropper punch and 1/4 fitting insertion tool, perfect used for piercing and perforating when installing the dropper and micro sprinkler in the polyethylene tube.Easy to Use: Simply press the tool through the tubing and then remove the punch tool with a pre-punched hole left; Insert the fitting into the tubing, then slide the tubing according to the slot and push the fitting into pre-cut hole, very convenient and easy to use.