Makita-built variable speed motor delivers 0-1,200 RPM and 0-4,000 BPM 3-mode operation for "Rotation Only", "Hammering with Rotation" or "Hammering Only" for multiple applications Torque limiting clutch engineered to prevent gear damage by automatically disengaging gears if the bit binds Faster drilling with synchronized RPM and BPM Job site tested shock absorbent handle protects the battery housing for extra durability This pre-owned or refurbished product has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed, your destination for pre-owned, refurbished products: A customer buys a new product and returns it or trades it in for a newer or different model. That product is inspected and tested to work and look like new by Amazon-qualified suppliers. Then, the product is sold as an Amazon Renewed product on Amazon. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee.