Spiral Tap Specification: Material: High Carbon Steel Measurement System: Metric Sizes: M1-M8/M1-M10/M3-M10/M4-M12/M5-M20/M9-M27 Package: 1pc Feature: 1 oxide coating for nice abrasion resistance and rust defense Hardened carbon metallic sliding block for top hardness and energy 2 dipped manage offers firm and comfortable grip in use when uncovered to fluid or moisture 3 wrench has 1 inflexible manage and 1 adjustable handle that adjusts the jaws to clamp instruments smoothly and firmly Straight tap wrench offers great leverage, and is specially appropriate for larger-diameter taps four faucet wrench can clamp assorted taps for tapping operations It can also be used with drills, reamers, screw extractors and other small instruments