Accusharp 4-Stone Rolling Knife Sharpener

Keeping an edge is the cheapest upgrade any knife gets. A dull blade takes more force to make it cut, and force is what puts a blade into a thumb, so a sharpener earns its place in a kitchen drawer or a pack long before another knife does.

Accusharp builds this one with four stones in a rolling format. Sharpening comes down to holding a consistent angle and working the whole edge from heel to tip, and doing that regularly beats waiting until a blade is too far gone to be worth saving.