Concord Blades CBD01250HP 1-1/4 Inch Laser Welded Dry/Wet Diamond Core Drill Bit 10 mm segment height, 3.8mm Segment Width, 5/8"-11mm Arbor Use Dry/Wet This core bit is used for general purpose dry drilling on a variety of soft brick and concrete block using either a Handheld Core Drill or a Core Drill Rig Does not come with a pilot bit Item is a pearlescent color. It changes between white and silver depending on the lighting