Sear is specially ground and polished to produce a trigger pull of less than 2-1/2 lbs. when used in conjunction with Power's hammer. Fits Ruger 10/22 and Ruger 10/22 Magnum. Specially ground to produce a light trigger pull under 3 pounds. Drop-in installation. Instructions included. Included parts:1- non adjustable sear2- sear shims1- disconnector spring1- cheater pin1- trigger pivot pin Notes: This is the companion sear for the Power Custom Competition Hammer (product number 607022).