Originally Posted by HillRider

That 4 N-m (35 in-pounds) single value wrench is fine for handle bar and stem bolts and similar use but inadequate for a lot of other components like HTII crank arm clamp bolts (100 in-pounds/111.5 N-m) or square taper crank arms or cassette lock rings (350 in-pounds/40 N-m). A pair of decent make beam wrenches in 1/4"-square drive and 1/2"-square drive will cover all bike needs at reasonable cost and with good accuracy.

Beam wrenches are fine for bike use since you can always see the torque scale. "Clickers" and "Buzzers" are very useful for automobile and similar work where the wrench may be out of sight but bikes never hide them.