Concrete rebound hammer tester

VTSYIQI Digital Concrete Rebound Hammer Concrete Hammer Tester with Stiffness of Spring 785±30.0N/m Pointer Length 20.0±0.2mm Test Range 10-60MPa Pointer Friction 0.65±0.15N USB Communication Port OLED Display

VTSYIQI Handheld Concrete Rebound Hammer Digital Concrete Strength Tester with Test Range 10-60MPa 2.08-inch OLED Display Pointer Friction 0.65±0.15N Built in Large Capacity Memory Stiffness of Spring 785±30.0N/m

VTSYIQI Concrete Rebound Hammer Digital Concrete Test Hammer with Test Range10-60MPa Pointer Friction 0.65±0.15N Store 999 Standard Components Nominal Kinetic Energy2.207J Stiffness of Spring 785±30.0N/m Built in Large Capacity Memory

VTSYIQI Concrete Hammer Tester Digital Concrete Rebound Tester Hammer with Test Test Range 10-60MPa Stiffness of Spring 785±30.0N/m USB Communication Port OLED Display 999 Data Storage

VTSYIQI Digital Concrete Test Hammer Rebound Hammer Test Equipment with Stiffness of Spring 785±30.0N/m Test range 10-60MPa Nominal Kinetic Energy 2.207J Support Voice Counting Pointer Length 20.0±0.2mm

VTSYIQI Digital Concrete Test Hammer Digital Concrete Rebound Hammer with Test Range 10-60MPa Stiffness of spring 785±30.0N/m 999 Data Storage Pointer Friction 0.65±0.15N Voice Counting