Simpson 3 4" x 10" Titen HD Heavy Duty Screw Anchor RFB Retrofit Bolt Designed for double sided spindle configurations Designed for double sided spindle configurations the RH LH rotation capability means this bit mounts and performs correctly on both sides of a multi spindle boring head without requiring two separate part numbers with a compatible replacement bit (model BIT2P) available when a fresh bit is needed Specialized heat treating process creates tip hardness for better cutting without compromising ductility the tip cuts cleanly into concrete while the anchor body retains the toughness needed to handle structural loads and a cleaner result on the job site