Erowa ER-033402 Compatible MTS Single Chuck 130mmX44mm. Rapid Holding Systems MTS Single Chuck is Erowa ER-033402 equivalent chuck and is used to accommodate single or multiple pallets, allows Internal machanical locking, end cap and plunger hardening. RHS-E7185 allows Internal machanical locking, end cap and plunger hardening. Its equivalent to Erowa MTS ER-033402 equivalent chuck.