Power chisel...

woodworker.com Arbortech Power Chisel yields 11,000 strokes per minute for powerful, smooth cutting:

Precision joints, recesses, corners and other material removal operations, such as texturing and lettering. High quality woodcarvers chisels only activate when pressed into wood and change out in seconds with "snap lock" fittings. Extended head provides better visibility and access to tight spaces.
Includes 20mm (3/4") flat sweep chisel and #7-20mm gouge, plus a 25ml bottle of cam oil for $170."