Hassay-Savage HSP-PA20-25001 ER20 x .250 Bore Dia. Punch Broach/Boring Adaptor & Nut
?When orientation and concentricity of an internal polygon profile is crucial, an ER holder can be used to securely hold a punch or index broach tool and accurately align the tool to center, while ensuring perfect alignment of the profile orientation. These quick change holders can be preset and reloaded in seconds.