A quality hammer is an essential component of a fine trigger job. CNC Machined from Solid Stainless Steel, R/C 48-52. 0.020 inches Hammer Hooks with 8 RMS Ground Finish, Narrow Half-Cock Notch to Prevent Sear Nose Damage, Precise Strut Pin Hole Location to Aid in Obtaining a Light Trigger Pull, Enhances Reliability and the Ability to Consistently Produce a Crisp, Yet Safe Trigger Pull, Narrowed to Provide Adequate Slide/Hammer Clearance, Skeletonized to Improve Lock Time. A quality hammer is an essential component of a fine trigger job, CNC machined from solid stainless steel, R/C 48-52 0.02 inches hammer hooks with 8 RMS ground finish