Dart Red Ten DCD Spiro 5 Piece Diamond Core Kit DB00880. Dart Red Ten DCD Spiro Cores have side vents and spiral barrel design helps to keep the cores cool resulting in longer life. Suitable for use in masonry, brick, concrete with medium to light steel reinforcing, granite, marble and stone. SDS Adaptor, Drift Key. Heavy Duty Carry Case. A-Taper and Pilot Drill.