The Tracer ACF-MK3 Clog Free Markers are all-purpose markers, supplied in black, blue and red. These markers can be used on almost every kind of surface, including dusty and shiny surfaces. This set comes with three different coloured markers, red, blue and black. The markers are perfect for Carpenters, Joiners, Kitchen Fitters and DIY enthusiasts. The long sturdy metal shaft increases the markers stability and therefore increases the pens performance. This set includes three different coloured markers: red, blue and black, along with Tracer site holders.