Brush Research 09D33911 Flex-Hone Cylinder Hone 9mm 320 Grit

The Brush Research 09D33911 is a precision Flex-Hone® ball-type cylinder honing tool engineered for surface finishing, deburring, and cross-hatch pattern generation in bores and cylinders. Manufactured by Brush Research Manufacturing (BRM), the Flex-Hone is a flexible, low-cost, single-use-friendly tool widely used in automotive, industrial, and powersports applications.

The abrasive globules are permanently laminated to flexible nylon filaments, allowing the tool to self-center and self-align within the bore for consistent, controlled results. This design produces the ideal cross-hatch finish required for proper ring seal in engine cylinders, hydraulic cylinders, and other precision bores.

Key Features:

• Flex-Hone® ball-type design for flexible, self-centering operation
• Produces a precise cross-hatch surface finish ideal for ring seating and oil retention
• Abrasive globules permanently bonded to flexible filaments for consistent cutting action
• Removes burrs, torn metal, and surface defects without aggressive material removal
• Compatible with standard drill presses, hand drills, and honing machines
• Suitable for use with honing oil or cutting fluid for best results
• Durable construction for repeated use across multiple bores

The Brush Research Flex-Hone is a trusted tool among engine builders, machinists, and powersports technicians for achieving OEM-quality surface finishes. It is ideal for cylinder reconditioning, hydraulic component finishing, and precision bore preparation.