The CPU-380I is similarly well designed and meant for heavy use. The nickel-plating gives a level of comfort that the block will remain in good condition, while the hold down system gives enough downward force for superior block to CPU surface mating. The new block comes with a redesigned hold-down system, not that there is anything wrong with the older version. With the new version, they improved the design by replacing the screw-in threaded uprights (which you would fix directly to the bottom base plate) with Phillips-headed uprights. These uprights contain a slot and groove system so that they are locked in position with the bottom plate."
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