Today Midnight Tools is launching a new line of Precision Roller Blocks. These blocks were developed in response to customer requests for rollers similar to our Low-Profile Roller Blocks that could deliver low runout positioning. Three sizes are available to support cylinders ranging from ¹/₂ to 9 inches in diameter. The standard version has bearings with a P5 6 micron runout tolerance, while the available Ultra Precision versions use bearings with a P4 4 micron runout tolerance.