SKILSAW SHD77M-02-RT 15 Amp 7-1/4 in. Magnesium Worm Drive Circular Saw (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. Lighter magnesium construction reduces user fatigue for enhanced comfort and control during use. Simple push button spindle lock makes it fast, safe and easy to change blades. Anti-snag lower guard reduces snags when making narrow cut-offs.