The top and bottom shoulder ends are not symmetrical or 'equally spaced'? Lim <blockquote type="cite">On 12-Apr-2012 9:03 PM, "Ron Nossaman" <<a href="mailto:rnossaman@cox.net">rnossaman@cox.net</a>> wrote: On 4/12/2012 7:48 AM, lim hock seng wrote: > And you were right, these are > SnS 'M' hammers. I th... Nope, those are production. They had a little dedicated drill setup that drilled two holes at once through the hammer, and the wires were inserted and twisted by hand. Ron N </blockquote>