no hardware wiz here. but i'm trying to mount some lights in my ceiling (which i believe is concrete). im not having much success in getting in deep. granted i only have a simple 12V black and decker, ive gotten to ~1 in. in one hole and 1.25 in another. and i need to get to about 2 in (or i may give up and just buy shorter screws).
i'm confused about what type of bit i should be using. ive got these black ones which i guess are the carbide tipped ones. and shiny silver ones with a slightly larger head, which i think are masonry bits. ive googled concrete bits and the ones shown look just like the ones i have. can anyone clarify or offer tips on drilling into a concrete ceiling?
UPDATE:
i was tired from drilling so i got shorter screws. i got a small pack of 1/4" 1-1/4" concrete screws from tapcon. i picked the 1/4" b/c ive been drilling with a 3/16" drill bit. tried screwing them into the drilled holes. no go. all the threading came off. i thought these concrete screws were designed to cut through?
new screw and attempted screw for comparison[/L]
i'm confused about what type of bit i should be using. ive got these black ones which i guess are the carbide tipped ones. and shiny silver ones with a slightly larger head, which i think are masonry bits. ive googled concrete bits and the ones shown look just like the ones i have. can anyone clarify or offer tips on drilling into a concrete ceiling?
UPDATE:
i was tired from drilling so i got shorter screws. i got a small pack of 1/4" 1-1/4" concrete screws from tapcon. i picked the 1/4" b/c ive been drilling with a 3/16" drill bit. tried screwing them into the drilled holes. no go. all the threading came off. i thought these concrete screws were designed to cut through?
new screw and attempted screw for comparison[/L]