Simplified slide-in design saves frame assembly time Integral clamps eliminate need to align separate nuts and bolts Tighten only one screw to connect frames PJ-100 is designed for 10 mm single slot frames M4 threaded hole provided on PJ-100T for panel installation.WARNING: This product can expose you to chromium, nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.