This is a Stanley 84" PR41 heavy-duty open center pole pruner.

Cutting Capacity: 2.25" Cut
Input Flow Range 3-9 GPM
Maximum Flow 9 GPM
Input Pressure: 1,000-2,000 PSI
Weight 11.5 LBS
Porting 3/8" NPT
Connector 3/8" in NPT in Handle


Manual:
https://www.stanleyinfrastructure.com/sites/defaul...