The SME Rifle Stock Riser with Loops Buttstock improves shooting comfort by raising the cheek comb to achieve proper eye alignment for shooting accuracy. Included are 5 different foam inserts of various thickness for desired comfort (1/8", 1/4", 3/8", 1/2", 5/8") Specifications and Features: Improves shooting comfort by reducing recoil force Includes 5 foam inserts of various thickness for desired comfort: 1/8", 1/4", 3/8", 1/2", 5/8" Improves gun fit. Gain proper eye alignment for shooting accuracy 100% neoprene with rubber back Built in swing swivel stud access for sling attachment Black