would of given no stars , these are the worst screws I’ve ever used , ordered for driveway gates that customer hade made . These are mild steel and I have the job of installing timber slats , fist of all they’re not self tapping as the thread keeps stripping and secondly the square drive heads disintegrate with any pressure used . I ordered these because of the large diameter head I’m now left with 14 lengths of cedar with large countersunk holes and 4 mm holes in the gates . It says in the blog that these products are used in the medical and nuclear, really ! Whatever you do , don’t buy from this company