A system for electrode dressing including a cutter with a rim and a center land supported on the rim by a number of flutes defining openings between the flutes. The flutes and the center land define a cutting profile of the cutter. The cutter is configured to rotate about an axis passing through the center land. Cutting edges are disposed on the flutes and are made of a first material having a Vickers hardness (HV) of at least 850 HV, overlaid by a second material having a Vickers hardness of at least 3200 HV. The cutter profile comprises a face cutting profile extending radially outward from the axis that is disposed at an angle of less than six-degrees relative to a radial normal of the cutter.

A handheld wood thread cutting tool with an elongated shank formed with a planar surface and including a first end and a second end with a length substantially longer than its width. The first end has a first wood thread cutting edge aligned substantially in parallel relative to a first vertical plane perpendicular to the planar surface and passing through the length of the elongated shank from the first end to the second end. The second end has a second wood thread cutting edge aligned substantially parallel to a second vertical plane perpendicular to the planar surface and running through the width of the elongated shank from a first side wall to a second side wall. A ball handle is affixed between the first and the second end.

A handheld wood thread cutting tool with an elongated shank formed with a planar surface and including a first end and a second end with a length substantially longer than its width. The first end has a first wood thread cutting edge aligned substantially in parallel relative to a first vertical plane perpendicular to the planar surface and passing through the length of the elongated shank from the first end to the second end. The second end has a second wood thread cutting edge aligned substantially parallel to a second vertical plane perpendicular to the planar surface and running through the width of the elongated shank from a first side wall to a second side wall. A ball handle is affixed between the first and the second end.

The invention relates to a device for retaining dust created by a drilling operation, comprising a closed envelope defining a space for receiving said dust, said envelope comprising a rear face for applying to a wall to be drilled, and a front opposing face through which a drill bit penetrates for the actual drilling operation.

The envelope contains a gel suitable for being mixed, by the rotation of the drill bit, with the dust from the drilling operation.