The .400 Punch is designed specifically for the larger flow .400 barb fittings. In addition to punching holes, it also inserts thefitting directly into the low-density poly mainline tubing.
The punch tip is hardened steel, amazingly sharp and is molded into a solid plastic handle. It comes with a plastic cover to protect both the tip and the user. To use it as an insert tool just slide the LSB400 over the shaft and push the tool into the mainline tubing (3/4" or larger). Give the tool a slight twist and it will punch a hole and insert the LSB400 at the same time. Once the barb is seated in the main line, just remove the tool and move on to the next row. It takes less than 10 seconds per insertion.