A jam block is a small slit drum made of plastic and used as a percussion instrument. It is the sturdy, modern version of the fragile traditional wood block. It is hit with a stick and it makes a noise that sounds like "tock, tock." Jam blocks are usually attached to timbales and drum kits. These blocks are often used in Salsa, Cuban, and Latin American music.
Jam blocks are closely related to wood blocks and temple blocks