Submicron series boring tools offer play-free tool carrier for direct diameter adjustment accuracy of 0.00005 in./div on dia. Carrier locking system provides precise repeatability, even under high speed or interrupted cutting. Six boring heads are available for boring in range of 0.787-3.94 in. and can be used with wide range of spindles. Integrated counterweight can be adjusted to any bore diameter by separate scale to permit high-speed operation.