【Reliable Concrete Tester】- Top-tier accuracy with our concrete rebound tester hammer. Designed for the American builder in mind, these tools guarantee dependable data every time, no electricity needed. Whether you're a seasoned construction expert or just starting out, our user-friendly design ensures effortless operation. Plus, with factory calibration, you can trust every reading. 【Precision & Durability Combined】- Crafted for the discerning you, our tool boasts a body of specially-treated stainless steel, ensuring no rust and lasting durability. With its high-elasticity, wear-resistant outer shell, and precision-engineered pointer shaft for even friction, you're guaranteed accurate readings every time. Invest in quality and enhance your toolkit's lifespan. 【Meet Multiple Standards】- Comply with international standards ASTM C805, ASTM D5873, EN 12504-2, EN 13791, JGJ/T 23, JIS A 1155. 【Lightweight Hammer: Portable & Protective Design】- Designed for the on-the-go American worker, this hammer stands out with its no-charge requirement and feather-light 1.7-pound weight. Portability meets durability as it's housed in a robust plastic case, cushioned with shock-absorbing sponge. Whether you're on a job site or a DIY project at home, this tool ensures protection and ease of transport. 【Versatile Tester】- Crafted with the American builder in mind, our concrete rebound testers are versatile champions. Whether inspecting a building, assessing a bridge, evaluating highways, or monitoring structural health, this tool is your trusted companion. Dive into a world of precision and reliability, perfect for every infrastructure challenge.