This is called a Schmidt hammer or rebound hammer and is used to test the hardness of concrete. : r/specializedtools
Gilson Schmidt Concrete Test Hammer (HM-75) - YouTube
Original Schmidt Hammer
Schmidt Hammer Testing – MTS
Original Schmidt Type L Concrete Test Hammer - Gilson Co.
Original Schmidt Digital Rebound Hammer - Gilson Co.
Rebound Hammer Test - AfD Engineering & Management Consultants
Langry Rebound Hammer Concrete Strength Testing Concrete Schmidt Hammer - Power Tool Accessories - AliExpress
Original Schmidt | Schmidt Rebound Hammer
Estimate Concrete Strength Using Rebound Hammer |FPrimeC - FPrimeC Solutions Inc.
Schmidt test hammer
Original Schmidt | Schmidt Rebound Hammer
Portable Schmidt Hammer High Polymer Shell Concrete Rebound Test Hammer Resiliometer Testing Equipment - Testing Equipment - AliExpress
Original Schmidt | Schmidt Rebound Hammer
Silver Schmidt hammer
Silver Schmidt Live Rebound Hammer | PCTE
Schmidt Concrete Test Hammers, Type L (N/mm2)
The Schmidt hammer in rock material characterization - ScienceDirect
Proceq Concrete Rebound Hammer Tester 31001002, Concrete Hammer Original Schmidt Type N (PSI) from the Inventor of the Schmidt Rebound Hammer - Amazon.com
Schmidt hammer - Wikipedia
NOVOTEST
Rebound Hammer Test on Concrete - Principle, Procedure, Advantages & Disadvantages
Silver Schmidt Concrete Test Hammer | Myers Rebound Hammers
GLTL Concrete Rebound Hammer Tester ZC3-A Resiliometer Hammer Test Meter Tool 10-60Mpa（ASTM C 805, ISO 8045） - Amazon.com
JCS estimation chart from the Schmidt hammer readings | Download Scientific Diagram
