Universal 1/4 inch fixing screw The camera slider uses a universal 1/4" mounting screw that fits most DSLR brands. This provides broad compatibility, easy integration with existing rigs, and eliminates the need for adapters or extra accessories when switching cameras or setups. Premium alloy construction Constructed from premium alloy, the 2-way macro focusing rail slider offers a robust and durable frame. The solid build is designed to withstand regular use in a variety of shooting environments, giving photographers confidence in long-term reliability. Smooth rack and pinion movement The slider features a smooth rack and pinion mechanism for precise and fast adjustments. This enables accurate framing and reliable focus control, whether you are capturing intricate close-ups or moving subjects in dynamic scenes. Movement in two directions with scaling The rail supports forward and backward movement, and it includes a scale for fast, accurate focusing. This combination is especially beneficial in challenging shooting conditions, such as close-up work, where precise control matters. 2-3 practical use scenarios - Macro and close-up photography: Achieve sharp focus on fine details of small subjects such as flowers, jewelry, or insects with controlled rack movement. - Product and studio photography: Obtain repeatable focus pulls for consistent product shots, reducing setup time and improving workflow. - Video and dynamic scenes: Perform smooth focus transitions and precise framing for tutorials, interviews, or motion sequences.