Harken 13mm High-Load Trolley with 3x Imperial Tapped Holes Track Lock Kit There are two interlocking tabs

There are two interlocking tabs to keep the adapter from rotating

Rescue and Descent Worksite Kit with Storage Bag

Vestil Manufacturing Corp Expandable Vertical Bar Racks

and civil protection

Harken 13mm High-Load Trolley with 3x Imperial Tapped Holes Track Lock Kit There are two interlocking tabsHarken 13mm High Load Trolley with 3x Imperial Tapped Holes The Harken 13mm High Load Trolley: A reliable solution for smooth, low friction linear travel. These trolleys, crafted from lightweight, corrosion resistant aluminum, feature recirculating ball bearings. Perfect for moving loads, hoisting equipment, and architectural applications. Equipped with three convenient imperial tapped holes on top. Specification: Length: 56 mm 2 3 16 in Width: 40 mm