Milwaukee 48-22-3103 Inkzall Chisel Tip Multi Surface Jobsite Marker w/ Water, Oil, and Dust Resistance (2 Pack) MULTIPLE SURFACES: This marker will work on wood, tile, laminated flooring, concrete, paper, cardboard, cinder blocks, and different kinds of metals. Perfect for almost any jobsite WEATHERPROOFED: This will work on materials if they are dusty, oily, or wet. No need to worry about whether your markings will stick in the rain MULTIPLE STORAGE SOLUTIONS: This marker has an onboard hard hat clip and lanyard hole so you can store this on your person in whichever way is most convenient for your easy access LONG CAP-OFF LIFE: This will still produce workable ink after being exposed to the air for up to 72 hours. You can misplace the cap and still be able to finish off the day without having to get a replacement NO-SLIP GRIP: The handle and cap are designed to be oversized and notched, so you can keep a firm grip on the unit even while wearing gloves or working in slippery conditions