Universal Carbon steel Countersink (Dia)16.5mm (L)50mm.Suitable for this countersink is constructed from carbon steel which means it's extremely hard durable and incredibly heat resistant.

UniversalDrill bit & countersink 3 Pieces.This Universal countersink drill bit set comes with 3 pieces and can be used with wood.

Universal 10 piece Masonry Drill bit Set.This Universal masonry drill bit set comes with 10 pieces and can be used with brick and concrete block.