| 摘要 |
A drywall mastic applicator or nail spotter that includes a mastic box with an open end and a plunger the fits into the open end that effectively seals it. The box can have a hole or other opening in another surface opposite the plunger so that when the plunger is depressed, the mastic exits the hole. A blade containing at least one groove can be mounted near the hole so that the mastic is applied as an exact bead. The blade can contain several grooves to produce a sting of beads. This arrangement speeds up taping and finishing drywall by applying an exact amount of mastic in the right place in the form of a bead.
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