Hilt alongside his blade typology. Oakeshott pommel types are enumerated with capital letters A–Z, with subtypes indicated by numerals. The grip is the handle of the sword. It was usually of wood or metal, and often covered with shagreen (untanned tough leather or shark skin). Shark skin proved to be the most durable in temperate climates but deteriorated in hot climates, and consequently rubber became popular in the latter half of the 19th century. Alternatively, many sword types opt for ray skin instead, referred to in katana construction as the "same". Whatever material covered the grip, it was usually both glued
Porcupine ray over its disc and tail. The diet of the porcupine ray consists mainly of benthic invertebrates and bony fishes, which it digs up from the sea floor. It is aplacental viviparous, in which the developing embryos are nourished by histotroph ("uterine milk") produced by the mother. The porcupine ray has long been valued for its rough and durable skin, which was made into a shagreen leather once used for various utilitarian and ornamental purposes, such as to cover sword hilts and shields. It is caught incidentally by coastal fisheries. Because it must be handled carefully due to its thorns, its