The Pink Collar-Saver Cones are used throughout blast block preparation. Once blastholes are drilled, the cones are inserted into the holes to maintain hole collar integrity and to keep debris out.
Priming and charging is done through the installed cones. Once primed, the cones allow for the downline to be secured to prevent the possibility of falling into the hole. When the blast team is ready to stem, the cones are removed and stored for future use.