This jack has a flat bar handle about 3\8 thick and 1,3\4 inch wide and the handle was rivited on each side,may have been hard rubber or wood or unkown material.
I bend every other lug over and then you can take them off once and still put them back on.They may be a bit loose [most repos. are] put some clear silcone on the inside over the lugs that you bent over.
How rare is a Walker mechanical floor jack? I have a nice working model,it must be out of the 1920s or older.the only thing wrong is the grip on the handle is missing and I dont know what to replace it with.