The Brush Research Manufacturing Co., Inc. Flex-Hone is a ball-style tool characterized by a shaft with small, abrasive globules that are permanently mounted to flexible filaments. It works well when handheld because the design is automatically self-centering. The cross-hatching capabilities of the tool are integral to the cylinder bore surfacing requirements of most internal combustion engines, ensuring that proper oil retention will be maintained in the cylinder bore walls at all times. Using the tool, parts such as carbide bushings, bore sleeves, hydraulic and pneumatic cylinders, and other cylindrical cavities can be surface finished on the production line – or resurfaced in the field – using a relatively inexpensive tool that requires little setup time. The Flex-Hone is available in 11 abrasive types and eight grits.