A blade guard is a protective covering that goes over the sharp part of a tool, like a knife or saw. It helps to keep you safe by covering the blade and preventing accidents. Full definition
So, if you see an even number over 6, you can safely assume at that point that the set will include blade guards or some sort of protection for them. (geekwrapped.com)
You get four knives and four blade guards here. (geekwrapped.com)
This kit comes with blade guards for all the trimmers, mirror, spray bottle, medium comb, barber comb, cape, 2 hair clips, scissors, cleaning brush, blade oil, soft storage case, left and right ear trim guide combs, eyebrow trim guide comb, ear trim guide comb, and 12 guide combs. (geekwrapped.com)