Part number: 650588-6. This switch is compatible with Makita DS4010 HR2230 HR2460 HR2470 HR2470T. Please confirm if your model matches it before purchasing. This switch is the start switch for SDS Rotary Hammer Drill. If the start button switch of your SDS Rotary Hammer Drill cannot be used due to long-term wear or accidental damage, this switch for replacement. This button comes with a noise filter. The size of the button on this switch is 43.3x18mm, and the size of the electronic component part is 65x28.5x22mm. You can also confirm whether it matches your power tool again through this size., Manufacturer: EMSea