· The cutter bits set contains 1 X straight boring gimlet, 1 X oval boring gimlet, 1 X serrated spade cutter, 1 X serrated spear head cutter, 1 X U cutter and 1 X spiral saw blade cutter head. · 7 pcs set sewer unblocker cutter tools, include 6 pcs different cutters and 1 pc pin key, for unblocking the clogged drains or sewer pipes.