This clip has 20 degree offset jaws to guard against shorting.
The AL21C clip in addition to a single penetrator pin near the fulcrum has a cluster of hardened needles (nickel plated to prevent rust) which insures penetration of insulation on 22 gauge, 24 gauge etc. Wire.
Two or more wires may be penetrated at once for a temporary "splice".
The insulation "heals" as needles are withdrawn. Stripping of insulation is unnecessary.
This clip has 20 degree offset jaws to guard against shorting.
