Looking at a set of masonry drill bits and wondering what would be better;
These Dewalts seem to be most people default choice at only £9.99 from SF.
http://www.screwfix.com/p/dewalt-extreme-2-masonry-drill-bit-set-5pcs/88598
However these have caught my eye from Irwin for pretty much the same money. Does 'suitable' for granite mean its harder/better?
https://www.amazon.co.uk/Irwin-10501918-Granite-Drill-Pieces/dp/B001V2WRZ2/ref=cm_cd_al_qh_dp_t
These Dewalts seem to be most people default choice at only £9.99 from SF.
http://www.screwfix.com/p/dewalt-extreme-2-masonry-drill-bit-set-5pcs/88598
However these have caught my eye from Irwin for pretty much the same money. Does 'suitable' for granite mean its harder/better?
https://www.amazon.co.uk/Irwin-10501918-Granite-Drill-Pieces/dp/B001V2WRZ2/ref=cm_cd_al_qh_dp_t