A cable tie includes a band that extends lengthwise from a first end to a second end. The cable tie also includes a housing, affixed near the second end, with a first opening to receive the first end of the band when the first end of the band is brought toward the housing in a loop. The housing includes: walls that enclose a space and have a stop toward the second end of the band; a first mass in the space; and a second mass placed in the space and between the first mass and the stop. When the first end is inserted into the housing, the first end passes under the first mass and the second mass and exerts a pull on the first mass toward the second mass. When the first mass is pulled toward the second mass, the second mass acts as a spring between the first mass and the stop and prevents the first mass from hitting the stop. After the first end is inserted into the housing and when the first end is being pulled out of the housing, due to a force exerted by the second mass to the first mass and the walls, the first mass squeezes the first end against the bottom of the housing and locks the first end in the housing.