The ProPebble Ruler is ¼" thick and comes in 2 pieces which fit together like a key.
Each ProPebble has 2 different size circles an inch apart. A smaller inside circle (for closed marking) and a larger outside circle.
The ProPebble allows you to perfectly place small circles. Let the ProPebble Rulers take the guess work out this process. The closed marking feature will allow you see exactly where and what those enhancements will do to your design. Sometimes the best work appears in small sizes!Watch a video of the ProPebble Ruler