The ICON Technologies Spin Weld Fitting Driver is designed for use with 1/8" flush FPT threaded fittings. Use this driver along with a router to affix spin fittings to your new ICON freshwater tank.• Driver for attaching spin weld fittings to your freshwater tank• Made of durable stainless steel for lasting use• For 1/8" flush FPT Made of durable stainless steel for lasting use | Icon Technologies Spin Weld Driver, 1/8" Flush FPT