Diameter: 4–12 mm
Length: 500–3000 mm
Polished wire surface: Detects artificial cracks as shallow as 0.1 mm deep
Cold-drawn wire surface: Detects artificial cracks as shallow as 0.2 mm deep
At 3,600 RPM (rotations per minute) for the rotating probe: 120 mm/second
At 6,000 RPM: 200 mm/second (12 meters/minute)