Acker - Model DCOMA-W -Carbide Insert Casing Shoes and Bits

Available in all standard sizes for OCDMA "W" Design casing. The carbide insert is a very economical bit for spinning in casing through soft rock strata or where casing is left in the hole. More economical than diamonds, the carbides withstand shock loads when drilling overburden. Carbides may not be sharpened and are usually run to destruction. There is no salvage value.