ToolTime and resultBest forDownside
Pull-through (manual)30 seconds to usable biteKitchens that would otherwise never sharpenEats metal; coarse edge fades in weeks
Whetstone #100010-15 minutes to a real edgeGood knives, Japanese steel, the ritual-inclinedTechnique takes a few sessions to learn
Electric sharpenerA minute, motorized consistencyVolume touch-ups, low-grip handsSame metal appetite, plus cost and noise
Pro sharpening serviceDays away, factory-fresh returnChips, neglected edges, once a yearPer-knife fee and the wait