This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com Over 500 lbs. of push force to handle higher viscosity materials allow user to caulk with ease. Variable speed selector lets user adjust the discharge rate to control the bead of caulk Switch lock helps prevent accidental start-up. Center balanced handle for increased user comfort