These new bodies have 20 holes carefully machined around the outside of the body, they have been positioned so that regardlessof where the user is sitting you always have a line of sight to the internal fitting isotope, there are no “blind spots”. The other benefitof the holes is that both the Black and White vesrions of the bodyweigh only 3gm, this gives a total weight of the clip, body and chain of only 8gm, incredibly light for an indicator of this performance.