Double head back massager and scratcher handheld meridian hammer massager back the roller massage hammer is made of wood and plastic material, for durable and long lasting use. salient brush surface design helps to promote blood circulation, up the metabolism, improve immune system and relieve fatigue. the stick is suitable for hips, legs, head, neck, waist, back, etc. massage hammer foot relaxation massager double head percussion massager. massage pat laminate massager back scratcher sticks wooden tools message hammer.