The Tikka Extra Large Sport Bolt Handle is an ideal addition to help operate the bolt while wearing bulky winter gloves or need more leverage in general. This larger bolt knob can be installed on all Tikka T3 rifles without any changes to the rifle. This bolt handle can be installed by simply pushing it over the existing bolt handle then then tightening the screw with the 2mm allen key (included). Tikka T3 Extra Large Sport Bolt Handle STXXLBH