Studs. Various automotive parts, and even home bits are double ended threaded rods.
Find some the right length, sharpen one end with a cutting wheel or such.. Or which have a rounded tip at one end.
Find studs which fits your screw in lost parts. Then add a nut. Screw in the threaded rod, tighten the nut with the pointed end sticking out.
Your spikes are replaced.
Find some the right length, sharpen one end with a cutting wheel or such.. Or which have a rounded tip at one end.
Find studs which fits your screw in lost parts. Then add a nut. Screw in the threaded rod, tighten the nut with the pointed end sticking out.
Your spikes are replaced.