Metric Hole Test Pattern

This is a metric hole test pattern that I developed years ago when I was doing more work with Shapeways. It is a flat, 3 millimeter thick piece with standard metric drill bit size holes, and can be used just as a decoration, or to measure detail, accuracy, and distortion (holes and flatness) in printed materials. It's also useful for judging the printed sizes of clearance or tap holes, or choosing a hole size to match a part you already have.

The holes range in size from 1mm to 3mm in 0.1mm