The Tuner "T" kits contain the Ruger 10/22 stock takedown screw in your choice of Stainless Steel (T1 Kit), Titanium (T2) or Blued Alloy Steel (T3).  They also include three vibration dampening rings, 1/8" hex wrench, bolt buffer, two stainless steel oversized trigger group pins, two stainless steel v-block barrel retaining screws, 5/32" hex wrench and three bonus 22LR dummy rounds.  Also includes the 10/22 flanged bedding pillar and a escutcheon! The escutcheon is of the same material as the takedown screw.