Works great for the longer kitchen knives where you might want to get to a lower angle. Remember you can lose about 4 degrees 20 might actually be 16
I bought this set for medium stone work and they worked great!
Select Base > Select Guide Rods > Select Vise > Upgrade Options
Great, you have the pre-2017 L-brackets with two screws, and ball joints with micro adjustment. Now let us know which Vise you have.