ASTM D624 is a common test method used to determine the tear strength of vulcanized rubber and thermoplastic elastomers. Due to the specimen shapes often used, this test is sometimes called a trouser, angle, or crescent test. This guide is designed to introduce you to the basic elements of an ASTM D624 test and will provide an overview of the testing equipment, software, and specimens needed. However, anyone planning to conduct ASTM D624 testing should not consider this guide an adequate substitute for reading the full standard.