Compatible with DEWALT DWCS600, DCCS620B, DCCS620B-CA, CMCCS620M1, CMCCS620M1-CA, DCCS620P1, DCCS620P1-CA, CMCCS660E1, CMCCS660E1-CA, DCCS670B, DCCS670B-CA, DCCS670X1, DCCS670X1-CA, DCCS690B, DCCS690B-CA, DCCS690M1, DCCS690M1-CA, DCCS690H1, DCCS690H1-CA. The serial numbers are 90639221 90618229, please check the serial numbers carefully. The combination design of bolts and washers can effectively enhance the stability of the connection, prevent loosening or wear, and ensure the smooth operation of the equipment. The bolts and washers are made of copper material, which is corrosion-resistant and durable, and can maintain stable performance even in high-load and long-term use environments. Bolts and washers are precision-machined and standard in size, ensuring the normal operation of the equipment after installation., Manufacturer: OTOTEC