Expanding pens and rotalock-type spline arbors are specially designed to hold all kinds of components for various applications. Ideal for turning, grinding, thread cutting and control. This mechanical performance is unique.

• Spline or thread clamping fixture
• Can be adapted to any mounting or tightening requirement
• Positions correct and holds the workpiece with internal splines or teeth
• The center of the inner channel's pitch to ensure concentric control / processing of the workpiece