Outer part of jaw is large toothed and used for maximum grip on large diameter pipes| Comfort Grip| Black oxide and anti-rust treated high alloy steel provide long life and durability| Commonly called a “Swedish Pipe Wrench”, the small head makes them ideal for working in confined areas| Inner part of jaw is fine toothed and used for maximum grip on small diameter pipes| Precision induction hardened jaws are designed with inwardly angled aggressive teeth