■Features
1. Distinct graduation design for Hi-Presicion measure
2. Triangle mark (Tri-mark) helps more accurate measuring
3. High durablity of surface printing with Extra Top Coating
4. Button Protection sticker keep out dust & protect from finger scratch
5. The rib on the side can be a shock abosorb
6. 2 Burrs can help you handle easily
7. Hexagobal shape is fixed comfortably with your hand