JOKR M390JOKR is a small, high quality flip knife built with buttons on the sides so you can spin it in your hand. This is not a dedicated spinner, it spins well at low speed and will wobble a little at high speed. This M390 version has an improved spinner mechanism and a brand new pattern on the handles. Warning: It is only safe to spin it when the blade is closed. Do not press on the blade trigger to initiate the spin, it might cause the blade to open.