• Dual scale, calibrated clockwise only
• Positive lock with spring loaded pull down lock ring
• Fast, accurate and easy to set
• Easy-to-read laser marked scales
• 1/4", 3/8", 1/2" drive feature quick release buttons which provide good socket retention as well as easy socket retention
• Accuracy: ± 3% CW of indicated value, CW from 20% to 100% of full scale
• Meets or exceeds ASME standards, ISO 6789 standards
• Individually serialized with matching certificate of calibration traceable to N.I.S.T