To start, we will need a rectangle with rounded edges (right click on Shape tool to select it) and light grey background.
Create a new layer and fill it with the same color. This layer will contain brushed metal texture.
Add a lot of noise (filters menu - noise - add noise).
Next, use Motion blur filter (filters - blur - motion blur) with the angle set to 0 and distance about 70 pixels. Then, hit Ctrl-Shift-L (Auto Levels) to increase texture contrast.
Now, hit Ctrl-G (group) - it will apply texture layer to shape layer, so that only a part of texture inside the shape is visible. To make texture look natural, adjust its blend mode (I changed normal to soft light, you might also want to try overlay, or linear burn, etc, and also to play with opacity).
Now the tricky part - we're going to create a custom gradient to give our metal a nice reflection effect. Select shape layer, open its blending option (layer style), turn on gradient overlay, choose black-to-white gradient, and then click on gradient itself to open gradient editor. You'll see it has two stops" - black and white. Now
After you're done with gradient, change its blend mode to overlay, or soft light. The result should look similar to shown here.
That's not all yet - create a new layer, and use a large brush with blurred edges to draw 2 white diagonal lines (you can also apply some blur). Then hit Ctrl-G to group this layer with previous, and, again, change its blend mode to overlay or soft light.
The little screws would be a nice final touch. use shape tool to draw a small circle. You can do it black or white - we're going to make it transparent later.
Repeat 4 times :-)
Now with a little help of layer style, make these circles real screws. If your layer color is black, set blend mode to screen, if white - to multiply. The result will be transparent layer. Then go to blending options (layer style), turn on Bevel and Emboss, set Style to Pillow emboss, size to 0, and highlight mode to color dodge. That's it!