What makes Raw Steel Ruggedized? Standard SD Old Flash Technology required Thick flash mounted on a weak PC board Multiple solder joints leads to potential failure points. Since the outside dimensions of the card still had to fit into the camera slot, thick flash required a very thin/weak casing which lead to cracking of SD cards. Hoodman RAW STEEL SD New Chip On Board technology miniaturized components so flash and circuitry are all one piece with no solder joints. Miniaturization allows for thick casings that safely sandwich the internal component in a bed of waterproof epoxy. Adding the stainless steel plate to the Chip On Board technology makes RAW STEEL the best choice for photographers wanting to elimate SD card breakage problems.