GTT patent technology, strong but flexible, high quality zirconia material, 3"-7" blades white/black, ABS TRP ... sharpen regularly.Advantages of GTT ceramic knife:SHARP, HEALTHY, FLEXIBLE, EFFICIENT, RUSTLESS-Never leave any metallic taste or smell on your ... and can bear higher drop test, but please avoid dropping for your safety GTT ceramic knife set, 4pcs with acrylic holder, zirconia white blade with ...