What I use: long handled loppers and a hand saw
There is a wide range of hand tools available for stem pruning, I have tried many over the years. My current preference is the Lowe long-handled anvil pruners which are light and strong and work well for branches up to 3 or 4cm in diameter. I also carry a pruning saw in a holster for large branches.
e: Heartwood: The art and science of growing trees for conservation and profit, by Rowan Reid