Professionally test the hardness and scratch resistance of paints, coatings, and films with this CGOLDENWALL Pencil Hardness Tester Kit. It's the standard tool used in labs and on job sites to determine if a coating meets specifications. The kit includes the main tester instrument, a full set of 13 graphite pencils (from soft 6B to hard 6H), and three weights (500g, 750g, and 1000g) for different test pressures. The instrument holds the pencil at a precise 45-degree angle against the test surface using two stainless steel wheels and the pencil tip. You then push it along to see which pencil grade scratches the coating. It's mechanically simple, reliable, and requires no batteries. Follow standards like GB/T 6739. Perfect for quality control in paint manufacturing, automotive finishes, industrial coatings, or DIY projects where you need to check durability. The all-metal construction ensures long-term use. A must-have for technicians, inspectors, or anyone serious about coating performance.