General description This adjustable tap wrench set includes a T-handle ratchet tap holder and five high-speed steel (HSS) metric thread taps ranging from M3 to M8. It is designed for efficient tapping in wood, plastic, and normal steel, making it a versatile tool for various DIY and home improvement projects. Technical specifications Material: Hard alloy steel with chromium-plated finish Tap sizes: M3 (50 mm), M4 (55 mm), M5 (62 mm), M6 (66 mm), M8 (70 mm) Length of T-handle ratchet tap wrench: 85 mm Length of taps: M3 (46 mm), M4 (49 mm), M5 (55 mm), M6 (59 mm), M8 (59 mm) Installation Chamfer the hole before tapping Use a drill clamp to support the tap Ensure vertical alignment during operation Rotate the tap 2-3 times to cut Confirm vertical alignment after cutting Tap 3/4 turn, then back off a quarter turn Pull out the tap after reversing Use cutting oil when tapping metal Usage This tap wrench set is ideal for processing various materials, including wood, plastic, and normal