langry concrete hammer 002 Laboratory Pendulum Bob  (1)

Improved pointer design, easy to adjust friction and more stable. Adopt CNC machining center and other machine tools to refine the movement, and the rebound value is guaranteed. Finely grind the spherical zero-setting screws to make the rebound firing smoother and smoother. Abrasion resistance of super-hard 6061 aluminum alloy casing, and the button is not easy to fall off by stretching process.