As gold seekers vigorously work with their tools, the wear and tear will decrease the lifespan until the tool becomes unusable. Every tool in the Prospectors world has a defined lifetime. The most durable tools are those which are produced in specialized Tool workshops -100 hours. Tools which are distributed through any promotions can have different lifespan according to the terms specified in the promo. If a player buys a tool that’s been "used" by another player, that tool will have a decreased lifespan. Always be sure to check the duration left on a tool before purchasing. You can check this characteristic on the tool page when you decide to buy any.
In the Yukon and Wild West, handmade instruments have a lifespan of 10 hours. In Grand Land, the same instruments have a lifetime of 50 hours.
You can filter new and used tools on the market, like in the screenshot below. Only new instruments are filtered here.