Johnson s 40-6900 builder s level has a 22X power magnification with a leveling accuracy of + 3/16 In./ 100 Ft. this along with a 200 Ft. working range makes it a versatile instrument for most construction applications. Ideal for leveling foundations driveways patios floors for grading streets curbs ditches for aligning fences; or any other light construction jobs. This builder s level has the ability to turn rough angles and has a fine tuning adjustment. Features large leveling screws which are easy to turn.