Bladed Shield
Olympus shop Balded shields
[They are the only shields with a +4 base speed bonus.
If you want to reach the maximum speed (515) you need one.
Their block rate is low.
Their damage is weak.
Also you should only buy them with 20 speed to make a 20 speed armor.
The blacksmith bladed shields
Their block rate is slightly higher: up to 54 And their damage as well.
They also have a + 4 speed base bonus.
But like all crafted items their bouses are capped to 18. Therefore the can not be used to acheive max speed.
They might have a fairly low block rate, their + 4 speed makes them shields you might want to consider for builds which do not require 515 speed.