(2.1) a pipe wrench (Pipe Wrenches) has both a handle and two handle single leg leg mouth wrench to adjust the size as needed. This type of wrench is manufactured for use in a workpiece that is round like a pipe wrench, etc. The mouth of teeth are quite sharp. As a result, the specimen was caught spanner turn by turn directions. If the rotation of the workpiece can be rotated by a wrench.