Usage Tips:Features: Expand your ring size effortlessly with our (2-pack) ring sizer and 25mm rubber mallet repair tool set. Made of durable cast iron, the ring sizer can resize rings up to 15mm wide while the rubber mallet is perfect for repairing dents and shaping metal. Great for jewelry makers, diy enthusiasts, and anyone who wants to resize their rings at home without the hassle of going to a jeweler. Perfect for use at home or in a professional setting, such as jewelry stores or repair shop. Our tools will save you time and money, while ensuring a perfect fit for all your favorite rings. Specifications: Material: Cast Iron Ring Sizer Enlarger Size: Approx. 7.48x2.36x1.18inch(19x6x3cm) Rubber Mallet Size: Approx. 7.8x2.36x0.98inch(19.5x6x2.5cm) Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Ring Sizer Enlarger 1x Rubber Mallet