After mortising out cabinet door hinges all day long, the last thing you want to do is chisel out the corners to achieve the perfect 90 degrees so the hinge fits perfectly. Not to mention, one hiccup when chiseling out a corner can be a complete disaster. To remedy this age old problem, this corner chisel makes cutting corners not only a good thing, it makes cutting corners easy! Quickly tap out your hinge mortised corners in no time at all with this spring loaded, super smooth corner chisel.