Best suited to people dealing with thicker, more stubborn corns or calluses than a smoothing tool alone can handle, and who are comfortable using a bladed tool with a light, careful touch. Anyone who prefers a gentler, gradual approach may find a foot file or pumice a better fit.

For corns or calluses too built-up for a smoothing pad to make a dent in, a blade removes the excess tissue directly rather than wearing it down gradually -- it's the difference between sanding and shaving. That makes it the more efficient choice for genuinely thick, hardened skin, provided it's used with care.

Soften the corn or callus in warm water before use -- do not use on dry, hardened skin. Hold the tool so the blade's protruding edge rests against the corn or callus, then draw it across the skin in short, light, controlled strokes to shave away the built-up tissue. Stop well before reaching healthy skin, and never force the blade or apply heavy pressure.

Pros:

• Removes thick, built-up callus faster than an abrasive smoothing tool
• Blade is replaceable, so the tool doesn't need to be thrown out once it dulls

Cons:

• A cutting tool can nick the skin if pressed too hard or used on dry, unsoftened skin
• Needs a steady, light hand, and isn't for use on broken or irritated skin