Feature:1. WEAR RESISTANT MATERIAL: Concrete rebound test hammer body is made of stainless steel, rustproof, wear resistant, possess high elasticity, fall reasistant2. ACCURATE AND CLEAR: The friction between the pointer shaft and the pointer slider is uniform, the index is accurate and clear, and the label is easy to read and understand3. APPLICABLE SCENARIO: Concrete test hammer can be used to test the concrete strength of building wall, roads or bridges, not applicable to tile or brick wall4. PORTABLE AND DURABLE: The rebounded hammer tester is lightweight and portable. The internal excellent spring has good resilience and is durable, better protect the product5. COMPLETE ACCESSORIES: The package include schmidt test hammer, grindstone, portable case, springs, screwdrivers, washer, etc. easy for you to install and useSpecification:Item Type: Concrete Rebound Test HammerMaterial: Stainless steel.Package List:1 x High Strength Concrete Rebound Test Hammer1 x Sandpaper2 x Spring2 x Screwdriver1 x Washer1 x Storage Box1 x Storage Case1 x User ManualNote:The concrete test hammer is only suitable for concrete, not for tile or brick wall.