This is a fantastic knife sharpener. I've had mine for at least 10 years and it still has many more years of service left. I use it to sharpen every knife we own: steak, pocket, kitchen, workbench, etc. I've reversed the blades (which is very easy & simple) only once and I'll probably do again in 3-4 years ... IF it needs it. Safe and well designed .... I've never noticed any metal shaving or particles at all.

Here's how I use it: (1) Place the sharpener on a solid surface and draw the knife through the metal "teeth" once or twice with reasonably strong pressure to remove any nicks that many have appeared, and then (2) draw the knife through the "teeth" with a light touch to finish the edge to a razor sharp edge. It's sort of like finishing painting with a brush .... light, feather-like strokes at the end to remove streaks. That's it. Takes about 10-15 seconds and is completely safe and not a dangerous feeling at all.

If you want really sharp knives (remember sharp knives are much safer than dull ones that can slip when cutting and cause injury) then go get this one ... inexpensive and fantastic!
This is a fantastic knife sharpener. I've had mine for at least 10 years and it still has many more years of service left. I use it to sharpen every knife we own: steak, pocket, kitchen, workbench, etc. I've reversed the blades (which is very easy & simple) only once and I'll probably do again in 3-4 years... IF it needs it. Safe and well designed.... I've never noticed any metal shaving or particles at all. Here's how I use it: (1) Place the sharpener on a solid surface and draw the knife through the metal "teeth" once or twice with reasonably strong pressure to remove any nicks that many have appeared, and then (2) draw the knife through the "teeth" with a light touch to finish the edge to a razor sharp edge. It's sort of like finishing painting with a brush.... light, feather-like strokes at the end to remove streaks. That's it. Takes about 10-15 seconds and is completely safe and not a dangerous feeling at all. If you want really sharp knives (remember sharp knives are much safer than dull ones that can slip when cutting and cause injury) then go get this one... inexpensive and fantastic!