• Knurled lock handle to maintain setting during removal for measurement
• Reading is obtained by measuring over contact points with a micrometer
• Gauging surface is hardened, and full round with a flat bottom
• Satin chrome finish. Includes light weight plastic case
• Product of China

Measurement range

• .125 to .200 or 3mm to 5mm
• .200 to .300 or 5mm to 7.5
• .300 to .400 or 7.5mm to 10mm
• .400 to .500 or 10mm to 13mm