core drill bits pdc 91mm tungsten carbide drill bits for sandstone drilling coal mining
- Category: >>>
- Supplier: Yongzhou Kaixin Superhard Drilling Tools Co. Ltd.
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Product Overview
Description
Product Description
Wear-resisting
Thickening Matrix, High Quality Steel
1-2 mm thicker than common bit outer diameter
Steel Body Protected by Multiple Alloys
All-directional alloy protects steel body, more wear-resistant
Internal and external considerations, double protection.
New design, No water plugging
Multi-water channel design, no water plugging
Intimate design,Each water outlet is connected with a water channel 
Packaging & Shipping
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