Schroder 4.007.0 Ratcheting 4-1/2-Inch Tap Wrench, 3/16-Inch to 5/16-Inch Drive Drill Inch: 1/4" - 1/2" | Screw Size: 3/16" - 5/16" All-steel design with chromium-plated finish for the highest durability Beautifully precise ratcheting action for high quality work Adjustable T-Handle can be "slipped" from side to side for positioning convenience and added leverage in tight places Easily switched from left to right handed operation, or locked for non-ratcheting use Parallel-clamping tool steel jaws and knurled chuck provide a secure, firm grip on hex or square drives