Load Rating: 1250 lbs. of suspended load on a 2-3/8" pipe diameter (max loads will vary by diameter of cable spool)Speed Rating: Unit will lock at approximately 200 RPM or 1 foot per second on a 2-3/8" drumThe unit only locks in one direction. The arrow on the hub of the Curtain Lock indicates the downward rotation of the device and should betested prior to powering the equipment