Stiletto position, and this lock, combined with the stiletto blade profile, enabled the knife to be used as an effective thrusting or stabbing weapon (unlike most U.S. switchblade designs of the day). Though most switchblade stilettos used a single-edge blade equipped with a long false edge, many variations exist. The stiletto switchblade is produced to this day in Italy and many other countries, and now includes many derivative folding knife designs that incorporate the same basic 'stiletto' or bayonet-style blade profile, including spring-assist, non-locking, and lock blade variants. Stiletto A stiletto () is a knife or dagger with a long slender
Heel-shaped cairn Heel-shaped cairn The heel-shaped cairn, with its usually cruciform chamber, is a type of megalithic monument that is found in Scotland, especially in Caithness and Sutherland and on the Shetland Islands. On Orkney, the Isbister Cairn is the only site that is similar in shape. The chambers usually lie in a round cairn made of broken rocks, which either contemporaneously or later were surrounded by the eponymous platform, up to 20 metres wide at the front and from 1.0 to 1.5 metres high, and were partly enclosed by large kerbstones. A gentle concave exedra is characteristic of the front face.