BLH-03 is a durable nylon "Wood" Block, also known as a Jam Block. It is extremely sturdy, so-called "high pitch" and can be attached to any percussion set or to a drum set (3.8 inch). They are made to withstand hard blows and are widely used in Salsa, Cuban and Latin American music, but they are also increasingly used in pop and rock music to strengthen or dress a groove.