General Info:  Knife pocket clip screw sizes are usually a T6 but smaller models may have T4 or T5.  All brands vary, but most pocket knife pivot screw sizes generally range between T6 and T9.  Sometimes you will need a T10, T15, or T20 for some Spyderco models.  Please learn which bit size you need prior to purchasing, or check out our larger bit sets which includes additional sizes. If you need a more well-round set with more sizes, we have more torx bit sets here.