5Inch DHD350 Ql50 M50 SD5 Cop54 Down The Hole
5Inch DHD350 Ql50 M50 SD5 Cop54 Down The Hole Button Bits. Features of DTH(down the hole) hammer bit: (1) Made from premium quality nickel-alloy steel 25SiMnCrNi2MoVA for increased durability and wear characteristics, and YK 05 tungsten carbide which is …
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