It's a plumber's anti-crack tool when he's on a job. Simply insert it into the crack, and the 'teeth' keep it from slipping out. The hole does several functions: 1. For keeping it handy on a self winding key ring 2. copper/pvc pipe sizer 3. used to bend copper pipes 4. hammer 5. the key end is used to clear clogged pipes
1. For keeping it handy on a self winding key ring
2. copper/pvc pipe sizer
3. used to bend copper pipes
4. hammer
5. the key end is used to clear clogged pipes