Lonroy BGD 506/2 연필 경도 시험기 (750g/7.35N±0.1N)

■ Three points are touched on the tested surface (roller, pencil lead)

■ The angle between pencil and the tested surface: 45°

■ Built-in spirit bubble, convenient to check level when tester is working

■ Pressure of pencil tip: 750g