Material: Steel, black oxide finish. Version N = handle slanted, with metric thread. Adjustable clamping levers are used in applications where either the clamping range is limited or where a specific lever position is required. The serrated bore in the spherical hub is fitted with a threaded-bolt insert, which engages in the hub with its own serrations. By depressing the clamping lever, the serrations are disengaged, freeing it for re-positioning in the most convenient position. When releasing the lever, the serrations re-engage automatically. Should a rotation of 360º not be possible, the insert can be slightly screwed in (after the lever has been disengaged) by means of the slotted knurled screw.