These bolt handle stems fit the standard Tikka T3 but are too tight for the T3x. There is only .002" difference between the the T3 and T3x, and these were made specifically to fit the T3.
Not sure which handle you want to choose? No problem! The stainless steel handle stem is thread with an industry standard 5/16-24 thread to accept other Mountain Tactical Bolt Knobs or other knobs from manufacturers such as Badger Ordnance, etc. You can switch out knobs with ease.