Harken 22MM Trolley with 2X 1/4-20 Tapped Holes and Central Threaded Pinstop

Trolleys feature recirculating ball bearings housed in strong, lightweight, corrosion-resistant aluminum for dependable, low-friction linear travel. Use for seat rail systems, window-washing apparatus, hoisting and moving stage equipment, and material handling. With 2x 1/4-20 tapped holes and central threaded pinstop, which when closed, locks the trolley in place.