Digital Model W-D-500 The W-D-500 features automatic calculation and digital display of the mean rebound number. It indicates the impact number, rebound number, average value, and mean value in double-digit figures on an easy-to-read LCD display. This precision instrument can display these numbers and values in one lot after all measurements are completed.

This is an ideal automatic hammer for quick and easy testing of the compressive strength of concrete where there is no need for recorded documentation of test data.