- Material: Made from carbon and metal, these carbon brushes are designed for durability and long-lasting performance. - Motor restoration: Worn brushes can cause poor motor operation; replacing them can fix intermittent motor performance. New brushes can also restore the motor's electrical braking function. - Compatibility: Compatible with multiple tool models including D10YB, CJ65VA, G10SR2, D10YA, G10SS, G12SR2 and more. Please verify compatibility with part number 999-021. - Armature check: When replacing brushes, inspect the armature for burns, cracks or other damage that could indicate larger motor problems. - Applications: - Use in common power tools such as drills, saws and grinders that require these brush configurations. - Routine maintenance in professional workshops to prevent unexpected downtime. - Restoration of electrical braking in tools showing reduced braking performance.