5 Piece Diamond Core Drill set. Christmas present and used only once to drill one air vent. The used drill bit will be marked with permanent marker to ensure there is no misunderstanding as to whether the drill be is going to be used and a return claim raised! The item “Diamond core drill bit set” is in sale since Saturday, October 2, 2021. This item is in the category “Business, Office & Industrial\Power Tools\Drills\Drill Bits & Accessories\Drill Bits”. The seller is “2005mauroo” and is located in London. This item can be shipped to United Kingdom.