Consisted of a toothed nylon strip with a one-way ratcheting hole at one end. You slide the pointed end into the hole and pull it tight, but it will not loosen up. Used widely bundling interior connecting wire of TV set, computer, home appliances, lamp decor, electric toy,etc. Also be used for fixing piping of mechanical machine or other things. 500(±5%) Pcs zip ties are included here.