1、WEAR RESISTANT MATERIAL: Concrete rebound test hammer body is made of stainless steel, rustproof, wear resistant, possess high elasticity, fall reasistant 2、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 understand 3、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 wall 4、PORTABLE AND DURABLE: The rebounded hammer tester is lightweight and portable. The internal excellent spring has good resilience and is durable, better protect the product 5、COMPLETE ACCESSORIES: The package include schmidt test hammer, grindstone, portable case, springs, screwdrivers, washer, etc. easy for you to install and use Item Type: Concrete Rebound Test Hammer Material: Stainless steel 1 x High Strength Concrete Rebound Test Hammer 1 x Sandpaper 2 x Spring 2 x Screwdriver 1 x Washer 1 x Storage Box 1 x Storage Case 1 x User Manual