Baader 2" ClickLock 2956258 clamp to S58a – for Diamond SteeltrackBaader 2" ClickLock S58 clamp with ring dovetail, suitable for all Baader Diamond Steeltracks (BDS) focusers Replaces the supplied standard clamp A small rotation by 20 with gentle fingertip pressure to the knurled lever is enough to securely clamp every 2" accessory. Ratchet function features acoustic and haptic display of the clamp position. This way you can hear and feel in darkness without looking if the clamp is opened or closed. Compression