I have two sets of these.  Simply put these are the best test leads on the market.  First thing that you'll notice is right out of the box, remove the twist tie, and they fall free and straight!  They have almost no memory what so ever!  The high quality silicone rubber jacket is flexible even in cold temperatures.  I've had mine in mid 30's temps.  Never does it feel like it's stiffening!  For me this is a huge plus as tangled leads, in cold temp leads to aggrivation.  Add in the dangers of working on switch gear and you have a recipe for disater!  Next thing you'll notice is the banana jacks.  Full length shrouds and smooth but firm fit in any 4mm jack on any meter give you confidence.  These aren't going anywhere.  Next is the probes themselves.  Long probes with a slight texture for extra grip.  Healthy finger gaurds to keep your hand from sliding forward and contacting the tip.  The tips themselves are the perfect length and SHARP!  If you need sharp tips for electronics, take a good hard look at these.  Finally the safety rating.  They are 10A rated on current and 1000V CAT III / 600V CAT IV.  Again, put simply, these are the best probes on the market for DMMs.