The choice varies between "pros". The pro guy with a truck and a business card will probably buy based upon price. The professional horticulturist at an arboretum will have expensive top grade by-pass pruning shears and they will be kept very sharp. He will never exceed their cutting capacity. He will switch to ratcheting loppers and they will be very sharp by-pass type with heavy steel handles. He will also carry a saw when pruning.
The by-pass type allows precise cutting. When I studied Horticulture in one of the prior centuries, I was taught to cut flush with the trunk and only the by-pass would allow that. Now the teaching is to cut at or just into the collar of growth where the branch joins the trunk. Healing is considered to be faster with the collar left on. With the change in position of the cut both the anvil and by-pass types can be precise. There has been some concern that the anvil type crushes branch but in reality it probably doesn't make any difference.
Having said all that, the key is to keep the pruning shears very sharp and never exceed the size capacity. Since I never do that, reality is to buy a new by-pass pair every spring.
I have an set old anvil pruning shears (Craftsman) that I have used for 20 years. They finally quit cutting as clean as I like. Last fall I bought a set of by-pass pruning shears from a store I won't name. I admit to cutting stock slightly larger than the recommended (.5 vs. .75). These new ones now cut worse than the old ones.
I need to buy a new pair or repair the older set.
My questions:
Which type do you think is better?
Which can cut stock slightly bigger with no damage?
Did I purchase at the wrong place or brand or is this typical? I do a lot of pruning so I need something that works and holds up.
Colbyt