Cleco PBA-12-AH is a spring assist parallel tool balance/torque arm which provides an ergonomic solution to torque reaction and true perpendicular alignment to the work surface.. The PBA-12-AH zeroes out the tool weight via springs which adjust to the tool weight. Arm reach=24", adjustable vertical reach =30'. tool weight=5Lbs, torque capacity=10 FtLb. PN 520009 Made in USA