The CB1X has a boring range of 2.6" to 5.12" designed to do single cylinder, outboard marine and passenger car blocks.

Block is located through main bearing bore with precision machined 2" rollover bar.
Air/oil system lifts block smoothly to two precision ground locating pads that are parallel to top plane of boring machine.
Air Float System centers quickly and easily. Tri-Radial centering fingers
expand through the full boring range for one step accuracy in centering (No centering fingers to change or lose.)
Direct-reading micrometer prevents mistakes (micrometer is available in SAE
or metric.)
Tool holders have spring loaded pin that sets for size to ensure accurate and consistent boring. Replaceable indexable carbide tool bits eliminate sharpening.