favorite knives, with replaceable blades

Kizer Uti Bear, dual-screw version   (utility blades)

One of my favorite fidget knives.

Notes:

• The main axle screw uses a T9 torx bit.

Oknife Otacle U1   (utility blades)

This is the only knife I've found that works well with ceramic blades, that doesn't cause them to constantly break.