1. Material: stainless steel
2. Easy to carry, wear-resistant and shockproof
3. The laser marking is clearly calibrated, making it easy to read the numbers clearly
4. Metal detection probe, easy to measure and durable to use
5. Weight: 0-30mm 25g; 0-50mm 19g; 0-60mm 32g
6. Size: 0-30mm 48x70mm; 0-50mm 90x54mm; 0-60mm 100x48mm