Concrete test hammer
James Instruments

Indicates the compressive strength of hardened concrete James Instruments, Inc. offers a complete line of Concrete Hardness Testers for the occasional user as well as the engineering professional. All hammers are spring activated and conform to ASTM C-805 as well as other European and Asian Standards. All are made to the most exacting machine tolerances to provide the end user with a consistent test every time.

Digital Rebound Hammer Model W-D-2000
Automatically calculates the hardness rebound numbers and the compressive strength. Complete with digital readout and printer, the unit can store readings for a later upload to a PC.

Manual Test Hammer Model W-M-250
Standard cocnrete hardness tester for the occasional user.

Calibration Anvil Model W-C-7312
For verification of the concrete hardness tester models above.