Now provide new updated version,with two screw mount on the bottom and laser etched ruler.

Introduction

The 2 way macro slider has smooth rack and pinion movement to provide extremely fine focusing adjustment. One 15cm rails can support movement of 2 directions---forward, back. Positive locking knobs assure rock-steady focus.
If you purchase two Piece macro sliders, they can be combined into a 4-direction macro slider. And it can also be divided into two one-way macro slider, it is very simple to mix and split. Suitable for: All DSLR or DC with standard 1/4" screw hole

Specification:

Material: Metal
Weight: 225g
Color: Black
Length: 160mm
Width: 93mm
Height: 24mm
Move Range: 100mm
Mount:3/8 thread,1/4 thread