Mix together well: oleo, sugar and vanilla. Sift together: flour, salt and pecans and stir into butter mixture. Chill at least 1 hour and form 1 inch balls. Place on ungreased cookie sheet and bake at 400 degrees until set but not brown. Roll in 10x sugar and when cool roll again in 10x sugar. Bake at 400 degrees for 10 to 12 minutes. Store in tight container.