Solid steel knobs This is not original maybe this will come apart after rust removal maybe this will come apart after rust removal lead paint test tester did not turn red, so no lead paint present maybe lead paint? Original colours were black and vermillion GOODELL-PRATT COMPANY, TOOLSMITHS, Greenfield, Mass. USA I am the chuck releaser! I am the nut releaser! self-etching primer This steel would not soften, even after annealing Checking for high and low spots Mild steel rod Case-hardening powder originally powered by foot/treadle