BlueSpot Tools B/S20006 SDS Bit Set 450mm 3 Piece 3 piece SDS Plus masonry drill bit set manufactured to a consistently high standard with a sandblasted finish and carbide tipped. For use on concrete masonry lightweight block and stone. 3 piece SDS Plus masonry drillbit set. Manufactured to a consistently high standard. Sandblasted finish. Carbide tipped. For use on concrete, masonry, lightweight block and stone. 1 of each 12 mm x 450 mm. 16 mm x 450 mm. 24 mm x 450 mm.