- Tire tread pattern/tire vernier depth gauge professional industrial tyre tread safety monitor scale.
- Made of 45# steel for durability, high hardness, good toughness, not easy to bend deformation, accurate measurement.
- Advanced scale, clear and easy to read and reduce error.
- Chrome plated surface treatment, corrosion and rust prevention, beautiful and practical.
- Easy to carry ruler compact, space saving, easy to carry.
- Material: Stainless Steel
- Square tread depth ruler
- Vernier depth scale:Extend the longest : 9cm/3.54inch
- Front the widest:5.5cm/2.17inch
- Back-end wide:2.5cm/0.98v
- circle tread depth ruler
- Vernier depth scale:Extend the longest : 11.5cm/4.53inch
- Retraction length: 7cm/2.76inch
- Front the widest:4.7cm/1.85inch
- Back-end wide:2.2cm/0.87inch
1 Piece Tread Depth Ruler
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