Baroque string action ruler and Fritz Ruler, the best pair, two piece set! Comes with a long period guarantee! [ Baroque ruler ] : Stainless steel  about 52mm90mm1mm  weight: about 30g  made in Germany [ Fritz ruler ] : Plastic  about 54mm85mm1mm  weight: about 10g A set of the best, most useful two items to have for a guitar. A must-have item that any guitarist would be happy to have. Safe and secure with a long-term written maker's guarantee (45 days). If by any chance you are dissatisfied with the product, please contact customer service. We will soon issue a refund or send a replacement product.