The DDC-42 Screw-Knob Clamp from Sunwayfoto is a standard length screw-knob, captive design clamp that's compatible with Arca-style QR plates. It mounts with a flathead screw from above--the ball post accepts an M5 screw and the clamp is 1/4" threaded. This clamp will mount to Sunwayfoto ballheads DB-36(LR) and DB-36TR(LR). It has safety stop relief grooves and a spirit level.
- Compatible with Arca-style QR plates