RHS Version Erowa chuck and adaptor intergartion includes D100 Manual Chuck with Rotatable Adapter. chuck is equivalent to ER-036345 QuickChuck 100P mounted on a rotatable adapter with centering plate 100 M8 ER-011599. Adapter is useful to horizontally rotate +/- 10 degrees instead of rotating continuously and slightly adjust horizontal angle of workpiece on spindle of EDM machine tool conveniently.