The Snap-on Tools Flex-Head TechAngle Micro Torque Wrench weigh less than a pound and operates on a AA battery. The slim, steel body and compact flexible head was designed for close-clearance jobs. It packs the same features as larger models, including LED progression measurement for better target torque indication at lower ranges, and LCD, LED, vibration and sound alerts to indicate when desired torque is reached. To check bearing pre-load and drag, this tool measures rolling torque and includes five scale references in ft-lb, in-lb, nm-cm and dNm. These wrenches are available in 1/4" (No. ATECH1FS240) and 3/8" (No. ATECH2CS240).