Utica Torque Limiting Screwdrivers - Standard Model - Standard product calibrated right hand only. Left hand calibration on request. - Precision micrometer scale calibrated in inch-ounces or inch-pounds. Metric models: cm-kg. - Easy-release bit holders securely retain bits during operation while permitting easy removal. - Anti-backlash design for repeatability. - Meets or exceeds ASME B107.14M and ISO 6789 specifications. - Adjustable model accuracy is 6% of setting, starting at 20% of full scale to full scale.