This is a Guard Plate for an axminster Band Saw.
Similar to http://www.thingiverse.com/thing:780900 but now with added holes.
These were on the original, but probably weaken any additive / subtractive manufactured parts.
Why are they there? Air flow? Sometimes You remove material from IM parts to avoid weakening the parts (often there are cavities inside the part where the material has shrunk away from the centre towards the walls).
This has a 45deg chamfer on one side to allow th bedplate to tilt and cut at different angles.
I would recommend this is CNC cut, not 3D Printed. If you MUST 3D print, please acetone paint before use.