Professional Compatibility: Drum Rack Clamp is a professional electronic drum clamp and cross connector, compatible for 19mm and 22mm three way electronic drums. Flexibility: Electronic drum tube clamp allows drummers to adjust the position of electronic drum pads or according to their playing and comfort. Stability: Electronic drum clamp and the mounting base ensure the stability of electronic drum pads or , preventing them from moving or falling off during performance. Easy to Install: Drum Extension Clamp is generally easy to install and remove without tools. Sturdy: Clamp Holder is made of metal and pp, which can withstand the weight of electronic drum pads or and the forces applied during performance. Size Chart:19cmx14.8cm/7.48inchx5.83inch Package Includes:1 Drum tube clamp set, L rod Note: Please allow slightly errors 1-2cm differences due to manual measurement.