Adjustable T-Handle Ratchet Tap Wrench. 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. Designed For Using With Taps And Can Also Use On The Left Hand Tap, Reamers, Screw Extractors And Other Tools With A Square Shank. Material: Stainless Steel Operate Main Point: 1. The Good Pit Hole Must Chamfering First 2. To Use Drill Clamp Supporting Tap 3. Tap To Vertical Alignment Operation 4. Cut Into Rotation Level 2-3 Times 5. Confirm Vertical After Cut Into 6. Tapping 3/4 Turn After A Quarter Back Feeling 7. Level Reversal Pull Out After Working 8. Use Tapping Oil For A Smooth Operation.