New RailBlock has 4 Types of Thread: 1/4", 3/8", M4 & M5 thread. Old one has 3 types: M4, M5 and M8 thread. the slot width is 34mm.

new wingnut railblock

The railblock Rod Clamp can be mounted on any standard 15mm rods on DSLR Rig.And there are 4 types of Thread: 1/4", 3/8", M4 & M5 thread, which are very useful if you like to DIY DSLR Rig.

Made of Aluminium Alloy.

4 Types of Thread: 1/4", 3/8", M4 & M5 thread.

1/4" thread: thread diameter is international standard 1/4";

3/8" thread: thread diameter is international standard 3/8";

M4 thread: thread diameter is 4mm;

M5 thread: thread diameter is 5mm.

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