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.