Spalted Maple and
Burl Maple inlays are the main feature of these Heartwood Secret Boxes. Each box is
constructed from solid hard wood (Walnut or Cherry) and is of top quality.
A mechanical puzzle is a self-contained object, composed
of one or more parts, which involves a problem for one person to solve by manipulation
using logic, reasoning, insight, luck, and/or dexterity. - Jerry Slocum