OTC's Ratcheting Chain Wrench can be used on objects with all kinds of shapes like: round, square, hexagonal, octagonal, and more - if you can get the chain around it, you can wrench it Adjustable length chain firmly grips objects ranging from 3 inches to 6-1/2 inches in diameter Ratcheting action makes it possible to re-grip/re-position the tool without removing the wrench from your work Generous 24 inch long handle provides the leverage needed for even the toughest jobs Rugged, all metal construction ensures this versatile tool will deliver years of reliable service