How to find out every pole saw feature?

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If you want to get one of the professional pole saws...this is what I have been using for years.

Head with blade...
Notch Equipment| Pole Saw Head Set with Adapter & 13in Hook Tip Blade

Extra blades. The hook at the end does not pull out.
Fanno Blade Only Hook Tip 13in | SHERRILLtree

4 foot pole is the best size to go with the head for general messing around. The 4 foot pole is perfect for low stuff while walking around.
Jameson Fiberglass Pole 4ft | SHERRILLtree

Any other poles you get should be 6 footers...(I have three 6 footers)...I can reach up to around 30 feet with all poles connected.
Jameson Fiberglass Pole 6ft | SHERRILLtree

Pruner head...(I have this one...plus one more 4 foot pole which stays on it)...
Marvin Pruner Head withAdapter 1.25in cut | SHERRILLtree