Have sharp edges in layer FX

Here is one of the ways to get hard edges:

• After adding drop shadow effect, right click on Effects below layer and choose Create Layer. This will create searate layer below with drop shadow on that layer.
• Drag layer with drop shadow onto Add layer mask icon at the bottom of the Layers panel. That will add transparency layer mask to layer with shadow.
• With layer mask selected  press Ctrl + L to initialize Levels adjustments which will bapplied directly to layers mask. Play with sliders, drag left slider to the right, drag it as needed to get hard edges.

Thank for your attention guys, to be more specific this is what I need to develop

Yes, just play with the settings. For drop shadow, just use distance and keep spread and size at 0. Stroke is a hard edge with FX.