Hitachi 955165 Centering Pin for 1-1/2-Inch Hollow Core Bit (Discontinued by manufacturer) Centering pin for 1-1/2-inch diameter hollow core bits Centering Pin for use with heavy duty 3-piece core bit system Accepts 1-1/2-inch diameter core bits CNC machined carbon-hardened steel Comes with a 30-day limited warranty Well-built with a simple design Use with 1-1/2-Inch core bit Designed for use with rotary hammers 100-percent quality consistency Comes with a 30-day limited warranty