The Baseline Hydraulic Push/Pull Dynamometer can be used directly or with a chain. The swivel hook attachment is used tor pulling and lifting tests. It has digital display readings on and LCD panel and includes five push-buttons to the control unit, including: on/off zero button to adjust, zero reading stored in memory, max button to display highest reading since last cleared, max clear button to clear height reading and lb/kg button to select display,. The analog models have a peak needle to record maximum effort. Optional handles can be attached to any unit.  The Dynamometer weighs only 1-1/2 lbs, and is latex free