Irwin Bi-Metal Hole Saws 4-1/8-Inch Knife Accessories Meets original specification lengths for

Meets original specification lengths for American

Pack joint compression for use on copper tube or PE pipe (cts size) for connecting to hard pipe

One (1) Red Inflatable Adapter

Aluminum head with wrap around bolted braces

A filter life indicator is built into the filter head which alerts you when you need to change your filter cartridge

Irwin Bi-Metal Hole Saws 4-1/8-Inch Knife Accessories Meets original specification lengths forVariable depth gullets provide more efficient chip clearance4 6 Variable pitch teeth for reduced noise and improved performanceElectron beam weld for stronger, longer lasting teethBi metal construction for toughness and long life