With over 1400 posts to your credit here at BF's I'm going to assume that you're an avid enough cyclist to have a bike or bikes that are a cut above using bikes with cup and cone style BB's. Far more likely your bike has a sealed cartridge style BB. It may be square taper or one of the newer spline styles. You'll need to study your bike's BB area to figure out which you have and then buy the tools accordingly.