Purchase Qty. Reference FOB Price
1-19 pieces US$47.00
20-49 pieces US$45.00
50+ pieces US$43.00
Product Description
Product Description 91# three-wing reinforced concave coreless drill bitrced concave coreless drill bit. Mainly used for: grouting holes, wattle discharge holes, slopes, supports, anchor cables, wells. Applicable strata: red sandstone, mudstone, coal seam, backfill, limestone, dolomite medium ...