This grid punch is the most reliable and economical tool for preparing nonstandard lengths of ceiling grid for fastening with rivets Hardened pin will easily pierce 18Gauge steel with little effort, allowing one hand operation while freeing the other hand to hold the material steady The tool’s thin profile and deep throat makes punching holes into awkward and hard to reach corners possible For best results place the steel cup firmly against the back of the material to be punched and squeeze with consistent pressure, bringing the pin into the material The rubber tip on the punch will protect painted or coated finishes from being marred