Sargent 9358 SAK 1-Inch Ultra Lite Size-All 4-in-1 Crimp Tool with 3/8-Inch, 1/2-Inch and 3/4-Inch Interchangeable Dies for Copper Rings Comes with 3/8-inch, 1/2-inch and 3/4-inch interchangeable dies for copper rings Changing sizes is as easy as 1-2-3: Press the spring-loaded pin, release the die, replace die Item Application: PEX copper crimp rings Crimp/HEX/Wire Sizes: 3/8-Inch, 1/2-Inch, 3/4-Inch and 1-Inch Length: 14-Inch; Weight: 4 lbs.