Cutlery and Allied Trades Research Association knowledge which is available to everyone on a competitive fee paying basis, however CATRA will enter into dialogue with consumers and users of cutlery, knives and tools where their expertise may be of help, on a free of charge basis. Petersen's Bowhunting magazine uses CATRA to measure sharpness of arrowheads. CATRA manufactures a wide range of special purpose equipment including knife and cutlery testing machines and knife sharpening systems including the CATRAHONE and CATRASHARP machines Cutlery and Allied Trades Research Association Cutlery and Allied Trades Research Association (CATRA) is an internationally known research and technology organisation in Sheffield, England which
Messer (weapon) Landsknecht. There is a typology created by James G. Elmslie for messers and falchions similar to the Oakeshott typology based on ongoing research. Messer are characterized by their single-edged blades. The lengths and shapes of the blade can vary greatly. Messer blades can be straight or curved. Extant examples of langes messer seem to have an overall length of with a blade, and a weight between . The defining characteristic of messer is their hilt construction. Quite notable in its construction was the attachment of blade to the hilt via a slab tang sandwiched between two wooden grip plates that