1. Hammer Spacer e Adapter for Oz Hammer to fit any T4 series Oz Post e Must be used in conjunction with the Oz Hammer OH 01 to drive T4 series Oz Posts with a jackhammer e Long lasting reusable tool Aas n r Oz Hammer F EL 1100 Driver OH 01 X b Spacer HSP T4 Only 4 Driver and 1 Spacer is needed to Instal all Oz Post Oz Post T4 Series