SharkBite 1" Multi-Head Crimp Tool Kit. It is used to crimp 3/8", 1/2", 3/4" & 1" Pex tube. It comes with a go/no-go gauge, 6" handle & provides about 5,000 lb of crimping force. Compatible with Copper Crimp Rings. Available in various configurations including lightweight composite handles to help reduce fatigue. Includes Go / No-Go Gauge to ensure rings are fully compressed. Provides up to 203 pound of crimping force. NSF approved. Durable steel construction.