Topcon RL-H5A Horizontal Self-Leveling Rotating Laser 1021200-15Topcon RL H5A Horizontal Self Leveling Rotating Laser 1021200 15 The Topcon RL H5A Self Leveling Rotary Laser 1021200 07 is accurate 1 16 in. at 100 ft., a range of up to 2,600 ft. and leveling within 5. Its slope matching feature makes it an excellent tool for excavating. This self leveling laser rotates at 600 RPM in full gear. If it is knocked out of position, it automatically re levels itself with an outstanding accuracy of plus minus 10 arc