Thanks! Good questions!
1) Titanium nitride (TiNi) is a very hard coating that's used to extend the life of high wear tools such as screwdriver bits and drill bits. It definitely won't wear off as easily as black oxide (black oxide has lower reflectivity though). I've heard some claims that TiNi will
not scratch but I purchased a used SOG crosscut that had some scratches in the TiNi.
SOG claims only that their TiNi coating is scratch resistant:
Titanium Nitride coatings are some of the toughest coatings that can be applied to steel. They exhibit extreme hardness, are exceptionally scratch and peel resistant and help increase longevity. This coating is applied using a unique process of plasma deposition that occurs in a complete vacuum.
TiNi was previously an option for most of the SOG multi-tools: the PowerLock (T60), PowerPlier (T52 and T65), Pocket Power Plier (T44), CrossGrip, and CrossCut. Unfortunately SOG hasn't used TiNi on their multi-tools in a few years even though they still use it on many of their knives. The old TiNi coated multi-tools are somewhat difficult to find now. SOG is starting a
collectors club which promises to offer some discontinued and rare items for sale. Maybe we'll see some TiNi-coated multi-tools in the collectors club. But I'd like to see SOG reintroduce TiNi as an option on their standard production multi-tools.
2) The SOG PowerAssist (
product page) has outside accessible assisted-opening blades. SOG says that it will be available in March. Only the two blades are outside accessible though.
3) On the EOD version of the SOG PowerLock 2.0, the C4 Punch takes the place of the 1/4" drive and the saw. Other versions of the PowerLock have a better selection of tools (
SOG's comparison chart). The PowerLock has 4 flat screwdrivers: large, medium on the end of the can opener, another medium one on the end of the file, and small on the end of the can opener. Unfortunately there's only a #1 Phillips drivers. I'd like the option for a #2 Phillips driver or a #1/#2 combination driver like the ones on Leatherman tools. The 1/4" drive and adapter accessory will allow you to use standard screwdriver bits.