Bosch’s BL8LB Worm Drive Lubricant is a custom-formulated oil that lubricates drive mechanisms to help ensure long tool life and efficiency. It is compatible with all Bosch worm drive circular saws. It helps to displace moisture, keeping the gears and motor cooler. The single-application container is convenient to store in a tool box or bag on the go. It is formulated specifically for use in worm drive circular saws.