Hard-Head wedges from Beaver State Plastics have a machined steel insert on the end of the wedge. This insert covers the driving end of the wedge and some of it extends into the ABS plastic body. This makes the Hard-Head wedge the best driving wedge available.
The steel insert resists mushrooming better than other plastic wedges.
These wedges can take a pounding and can lift an incredible amount.
ABS plastic surface is textured, so it is less likely to back out.