Step blocks are used in a variety of way in Milling machines. These light duty versions can be used to hold things to a CNC router table. I plan to make a variety of size or figure out how to make them Parametric.These blocks are used in pairs to clamp or hold an item in place for machining. They come in assorted lengths and heights but all blocks are compatible with each other. The reason for making this thing is to have a version made out of a material that won't break your expensive end mills or drills when you cut into them by accident.I found an error in the original file so I am now uploading a corrected version.When I have completed the block set I will also include a T-Nut base to fit most common slotted tables.