Bosch GOL24-RT 24x Automatic Optical Level Kit (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. 24X power lens for excellent magnification Solid metal base provides stability in all weather conditions for precision leveling Horizontal circle graduation for determining angles in 1 degree increments with fine motion knob Large aperture -allows more light for a sharper image