MM-12 Twin-M - The Commercial Choice, stability and accuracy come together in the MM-12 Twin Series. The MM-12 twin adds an additional wheel for greater stability and traction, real estate agents, law enforcement officers, construction workers and contractors rely on the accuracy and balance of the MM-12 Twin, primary uses: real estate, janitorial, home / interior dimensions, appraisals, accident / crime scenes, landscaping specifications: counter limit - 1,000 meters, wheel circumference - 30. 33 cm, diameter - 9. 52 cm / 3. 75", handle type - telescoping, collapsed dimensions - 19. 25" / 48. 89 cm, extended dimensions - 1M, 2. 87 cm, shipping weights - 2 lbs