Metallophone Metallophone A metallophone is any musical instrument consisting of tuned metal bars which are struck to make sound, usually with a mallet. Metallophones have been used in music in Asia for thousands of years. There are several different types used in Balinese and Javanese gamelan ensembles, including the gendér, gangsa and saron. These instruments have a single row of bars, tuned to the distinctive pelog or slendro scales, or a subset of them. The Western glockenspiel and vibraphone are also metallophones: they have two rows of bars, in an imitation of the piano keyboard, and are tuned to the chromatic
Framing hammer tunnel syndrome . The milled face of the head consists of a waffle-like grid of small four sided pyramids. Nails typically used for framing have a grid of intersecting raised metal lines on the head of the nail. The raised marks on the head of the hammer grip this grid, which helps to prevent the hammer from sliding off the nail head when striking a nail. Since the frame typically will not be seen on the finished house, the inevitable marring of wood surfaces by the milled hammer face is not an issue. A hammer with a smooth striking surface