Aluminum alloy construction: crafted from Long-lasting Aluminum alloy, this gauge tool is to wear and tear, ensuring longlasting performance. Convenient bolt measurement: easily measure bolt diameters with this tool, making it a convenient addition to your measuring instruments. Precision engineering: engineered for precise measurements, this tool provides accurate readings, essential for detailed and meticulous work. Portable and easy to store: its small size and nature easy to transport and store, ideal for outdoors use. Wide application: this multifunctional tool is suitable for uses, including measuring drill bits, making it highly versatile. Colour:Black Material:aluminium alloy Package Contents: 1 * Hole Measurement Tool 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 real thing. The measurement allowed error is +/- 1-3cm.