HandyMark Drywall Marker 2-Pack #HM1002-BF No Measuring extremely fast and virtually error-proof. So easy to us even beginners enjoy professional results. Saves time and materials often wasted when using a measuring tape easily paying for itself. Versatile works with standard multi-gang plastic outlet boxes and with a simple modification even with receptacles in place. Constructed of tough ABS plastic and stainless steel pins providing years of satisfaction.