4:
these 3 are the constants:
Erickson 3.5 EDC slipjoint
Rinaldi Matrix fixed blade
Strider PT CC
and I carry one of these depending on if I am in the shop , at work , or heading off to the range: Remington Slip , Kershaw Double Duty , Strider AR , Sodbuster Jr.
Of all of them , the Matrix see's the most use , with the Erickson 2nd.