Pitch: 0.5mm（M3）/0.7mm（M4）/0.8mm（M5）. Material: 304 stainless steel. 【Feature】 - Driven by cross grooves, the force is uniform, and the cross-shape can help self-center the screw to avoid it drilling at odd angles, easy to lock firmly, not easy to slip out, and is convenient and quick to install.
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