The SM/RTC Tank Trolley is a mobile anchoring point that rolls along the top ridge of field erected storage tanks or other similar surfaces. Provides continuous tie-off of lanyard while working. The trolley contains two bearings that roll along the top of the tank. A forged steel O-ring provides a convenient anchoring point for fall protection equipment.

Weight: 14 lbs

PART: SM/RTC-TankTrolley

More information here.