Sog utilizes their trademark "Arc-Lock" locking mechanism, which they claim will withstand 1000 lbs of force at the lock, and is fully ambidextrous.  The blade is swiftly opened with the kick deployment on the back of the knife.   When you clip the Vulcan in your pocket, the entire knife is concealed except for the clip, there is no part of the knife sticking above the pocket line as some clips are designed to do.  This may make it a little more difficult to remove from your pocket if you are wearing close fitting clothes.  (The clip is also reversible.)
The handles are black Zytel, and when the knife is open the finger and thumb guards are quite pronounced and effective.   The textured Zytel also has sculpted grooves over the thumb studs for ease of opening, and a lanyard hole at the back.   The blade of the Sog Vulcan is VG-10 steel, which is super strong and has good corrosion resistance.   All Sog knives are guaranteed against defects in workmanship and materials for the life of the original purchaser, so keep your receipt if you buy one.  Again, abuse and misuse will void the warranty.   Sog offers an engraving service and will laser engrave your knife for $12.00... a nice touch especially if you are buying the knife as a gift for the discerning knife owner in your bunch.   MSRP on the Vulcan is $150, but you can pick one up for around $90 if you shop around.