wedges and anchor for prestressed concrete Parts: anchor, wedge, block, spiral, duct payment ... , swaging machine etc. Components: anchor head/plate/ring, 2/3pcs grips/wedges, block/backing/base ... /bearing plate, spirals, steel/plastic duct/pipe/tube/couple ... etc. In post-tensioned structure of pre-stressed concrete, anchorage anchors play a very important role. ...