we can offer Tribrachs Tribrachs with optical plummet Detailed Product Description -Superior price and quality combination -Circular leveling sensitivity: 10'/2mm -Optical plummet focusing range: 1.5 to 50 ft. (0.5 to 15m)-Standard 5/8 x 11 base -Weight: 1.85 lbs. (.84kg) -Colors available: Black, Green, Grey, or Yellow