Makita HR4002R 1-9/16 in. SDS-max Rotary Hammer (Certified Refurbished) This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. Built-in torque limiting clutch disengages if bit jams Powerful 10 Amp motor delivers for the most demanding applications One-touch sliding chuck for quick and easy bit changes Dual mode operation for multiple applications (hammering with rotation or hammering only)