Part number: 999-021 Product: Carbon Brush (4 pairs per pack) Includes: Carbon Brush pack for Hitachi tools Compatibility Hitachi Power Tool Models D10YB, CJ65VA, G10SR2, D10YA, G10SS, D10YA, G12SR2, F-20A, GP2, G10, WR16SA, G10, P20SBK, G10SA, DH25PB, G10SB1, CE16SA, G10SD1, CN16SA, G10SR, CN16, G12S1, CE16, G12SA, WH16, G12SR, C4Y, P20SB, C16, PDA100D, CB10T, PDM125, CB10VA, PDP115A, CJ65V, PDS115A, CJ65V, SO-110A, TR6, WH14, C8FSE, C8FSHE, G12SS, P20ST Note Please reference tool diagram to ensure part compatibility. Key benefits - Restores electrical contact and motor performance in compatible Hitachi tools - Four pairs per pack provide ready replacement for multiple tools - Made from high quality carbon material for durability and reliable conductivity - Sized and shaped to fit standard brush slots in the listed models - Helps maintain smooth operation and reduces sparking as brushes wear What is included - 4 pairs of carbon brushes (per pack) Use scenarios - Field repair of a Hitachi drill or saw (examples include models in the compatibility list) where power drops, stalls, or irregular operation occurs. Replacing worn brushes with this set can restore performance. - Routine maintenance on Hitachi tools such as G10, G12, CJ65, or CJ65V series during scheduled service to maintain efficient motor operation. - Inventory for service technicians or repair shops that frequently service Hitachi power tools, ensuring ready replacements for multiple compatible models. Function and performance notes - Function: carbon brushes provide the essential sliding electrical contact with the commutator to drive the motor. - Material: carbon designed for durable conductivity and wear resistance. - Compatibility: explicitly compatible with the models listed; verify with the tool diagram for exact fit.