- HS (Eichiesu) rivets, is an existing 2nd of rivet series a different shape of the head with a series of [minus mold]. - HS rivets, the shape when viewed from above, has become a H-shaped (H-Shape), hatch and warhead missile, is shape turn often to such replacement of the joint circular portion. The such as replacement of these sites [minus mold] was a classic, but you will be choices increases. - Because it is machined parts, cliff individual file is unnecessary. Is omitted, such as sanding of small parts that time-consuming, so that you can shed work time to other parts.