Files in this archive:

stairs.gbl		bottom layer gerber file
stairs.gko		keep out layer (ie board border) gerber
stairs.gtl		top layer gerber file
stairs.gbs		bottom layer solder mask
stairs.gts		top layer solder mask
stairs.gto		top layer silkscreen
stairs.dri		NC Drill report file
stairs.txt		Excellon drill file
read_me.txt			This file