things get better once you get the hang of it, if your drilled hole is too big for your anchor, just get bigger anchor and hammer it in, if you're not sure, go small, start with 5.5mm bit, try put in the anchor, if it doesn't fit, don't try to force it in, if the anchor get smashed half way in lagi susah

This post has been edited by set: Jan 20 2015, 02:59 PM

if you dont know what bit to use, just buy bosch multipurpose drill bit, tile wood steel wall brick whatever shit, one bit to drill them all

http://www.lazada.com.my/catalog/?q=bosch+multipurpose

multipurpose doesn't cost that much but it cannot be used to drill quartz top, I believe you need diamond coated tip for that one.

Tile doesn't really need 30minutes to drill, just keep dipping the bit into the water to keep it cool while drilling, i'll say I used 5 minutes average per tile hole, I was only using 650w b&d impact drill, my friend used his bosch rotary hammer drill and he drill a tile hole are pretty much under few seconds.

depends on type too, especially those rough surface porcelain tiles, usually in bathroom those type, good luck with those if you're using rm150 drill like me