Specification Product Name: Self-locking Hollow Tape Measure Material: High-quality stainless steel and ABS Color: Black tape (male feet) Dimensions: 8.5 * 7.5 * 4.2 cm / 3.35 * 2.95 * 1.65 inches 7.3*6.4*4.2 cm /2.87*2.52*1.65 inches High-quality stainless steel durability: This tape measure is made of high-quality materials and features rust resistance, wear resistance, and resistance to harsh usage conditions. The sturdy body ensures that it will not deform or crack, making it a perfect choice for long-term use in construction, carpentry or home projects Unique design: The unique hollow design of this stretchable tape allows sand and water to pass freely. It is suitable for outdoor and humid environments. Even under challenging working conditions, it can ensure consistent accuracy Magnetic base and self-locking function: The built-in strong magnet firmly adheres to metal surfaces such as railings, doors or shelves, eliminating the need for manual measurement. Self-locking mechanism to prevent sudden retraction, keeping your fingers safe and your measurement stable Clear and accurate scale markings: High visibility, precise printing of scales, inch and centimeter markings, easy to read in any light. The dual-end hook design supports both internal and external measurements, ensuring that each reading is precise and reliable Compact, shockproof and multi-functional: A lightweight yet sturdy thickened shockproof housing to resist drops and impacts. Product list One 5*25mm self-locking magnetic perforated tape measure One 7.5*25mm self-locking magnetic perforated tape measure