This handle locking nut is designed for use with breaker hammer model 9234 0002 18.It is constructed from hardened steel to endure torque applications during heavy-duty demolition and chipping tasks.The hexagonal locking design helps resist loosening under repeated vibration and impact.Compatible with standard 18 mm shank breaker tools commonly used in construction, masonry, and concrete removal.Features corrosion-resistant plating to support in damp or dusty job site conditions.