Apply standard:
ASTM D3574 / ISO 8307 / JIS 6400
Information: Magnetic design:
The steel ball is easy to be mounted on the release point.
Userfriendly design
It is easy to take out the steel ball with the magnetic steel bar.
Ensure design
The specimen must be in the standard size to put in the testing area to ensure accuracy.
More Details:
https://www.youtube.com/watch?v=2XKkp0TtlwM