Minelab E-TRAC COVER / Minelab Control Box Cover
Protect the face of that Minelab Metal Detector or you will be sorry. I can't remember how many times that control box cover has saved me from scratching the face of both of my Minelabs. They are not that expensive and there are a few options out there. The Minelab E-TRAC cover I purchased recently off ebay is water resistant as well as having a thicker degree of protection on the clear screen
Don't say you were not warned. If you go in to a metal detecting forum you will likely find at least half a dozen people looking to replace their face plate on their metal detector, because the screen was scratched or gouged with a Lesche digging tool.