Fangrui Product Details Enhanced Durability And Resistance: Crafted From High-quality Acrylic Material, This Crack Monitoring Gauge Set Offers Exceptional Wear Resistance And Durability. It's Designed To Withstand Rigorous Use In Various Environments, Ensuring Long-lasting Reliability In Tracking Crack Progress. Precision Measurement For Professionals And Diy Enthusiasts: Ideal For Both Professional And Personal Use, This Crack Gauge Set Provides Accurate Measurements For Monitoring Crack Development. Its Precision Makes It Indispensable For Projects Requiring Meticulous Measurements And Structural Assessments. Versatile Application Across Scenarios: Whether You're Tackling Home Improvement Projects, Engaging In Interior Decoration, Or Conducting Professional Inspections, This Crack Gauge Monitor Is Your Go-to Tool. Its Versatility Makes It Suitable For A Wide Range Of Applications, From Simple Diy Tasks To Complex Construction Assessments. Essential Tool For Structural Monitoring: This Crack Monitoring Device Is Crucial For Anyone Involved In Maintaining And Repairing Buildings. It Helps Detect Wall Deformations And Cracks Effectively, Making It A Vital Tool For Homeowners, Construction Workers, And Engineers Alike. Robust Construction And Easy To Use: The Crack Gauge Set Is Not Only Tough But Also User-friendly. It's Designed For Easy Installation And Reading, Making It Accessible To Both Amateurs And Professionals. This Tool Ensures That You Can Monitor Structural Integrity With Ease And Precision. Screws: Random Color, Don't Accept The Specified Color Colour:photo Color Material:acrylic The Actual Product May Have Slight Color Difference Or Difference, Which Not Affect The Use Package Contents: 4 X Thickness Gauge Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The L Thing. The Measurement Allowed Error Is +/- 1-3cm.