Features: Easy installation for efficient setup: The heavy duty clamps feature a user-friendly design, allowing quick and tool-free attachment to trusses. This simplifies the setup process, saving time during installations or adjustments. Compact and portable for convenient transport: Lightweight yet sturdy, these square clamps are easy to carry and store. Their compact design makes them a practical addition to any lighting technician's toolkit without adding bulk. Specifications: Material: galvanized Iron Color: black Size: designed for square tubes with diameters ranging from 40-60mm Bearing: 88 Lbs /40 kg Package includes: 4 x Stage light clamps hook for square tube Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays. Pointed items are included, please be careful when using and please keep them away from kids