Although this part is more expensive than buying just the
iPod Touch Digitizer and Glass, it is the absolute easiest way to repair your ipod touch with cracked glass.
This is a complete Digitizer Assembly for iPod Touch Gen 3. Includes Pre-Assembled Digitizer, Glass, Frame and Home button. Compatible with 32GB & 64GB Gen 3 iPod Touch Only (volume button on the side - pre Aug. 2009).
This part allows you to avoid scraping the broken glass out of its frame and having to attach the new glass to the old frame.
Remove your old digitizer and frame assembly, plug in the digitizer connector from this new one and snap the new assembly into place.