This product is designed for thick and ingrown nails, suggested to soak them into water for 5 minutes before cutting and trimming. It does not require you to adjust springs since springs are built-in for easier use with less effort. Sharp stainless-steel blade is made into a 25-degree curve so that it can reach deeper into the nails. Please put the silicon cover on after you use it. [Ultra Sharp] New sharp curved blade specially designs for ingrown & thick nails, make it easier to cut and trim [Heavyduty Quality] Made of high quality surgical grade stainless steel for anti-rust and long durability [Built-in Springs] Upgraded from springs to built-in spring for avoidng broken springs and less effort to use [Upgraded Handle] Handle made with ABS material for non-slip and softer touch [Innovative Design] Design inspired by the shape of antlers and olecranon beak