they're shown as 'without insulation grip' because they have no insulator, the mfgr lists them as 'with insulation support' because they're the "dual crimp" style you think you want, the 2nd crimp grabs the insulation .... and they're all for small wire gauges, listed as 'NOT heavy duty', the common type of terminals used in electronics, not automotive
if you're going to have to use some heat shrink insulation anyway, and other style terminals for larger wire sizes and different types of terminal, why use those for limited locations? certainly there are more important criteria for electrical work than 'looking cool'
Bill
