1. Tap Wrench Size: Suitable for tap sizes: 1 or 4' 3 or 4' (UNC or UNF) or M5M20 (metric). The black oxide coating provides wear resistance and rust prevention. Sliders made of hardened carbon steel ensure hardness and strength. 2. Features: The tap wrench has one fixed and one adjustable jaw for easy and secure tool clamping. Straight tap wrenches offer strong leverage and are particularly suitable for largerdiameter taps. 3. Wide Application: The hand tap wrench can firmly clamp various taps for threading tasks. It can also be used with drills, reamers, screw extractors, and other small tools requiring manual rotation. 4. Easy to Use: Operate with both hands by turning the tap wrench in a specific direction to process, , or clean internal threads. The plasticcoated handle ensures a secure and comfortable grip.