The Irwin 115mm Speed Plus Drill Core Rod is a replacement core bit designed for use with Irwin's auger drill systems, delivering fast penetration and clean hole extraction in timber and composite materials. The Speed Plus design features optimised flute geometry for rapid material removal and reduced binding, making it ideal for electricians, carpenters, and contractors performing repetitive drilling tasks. Compatible with standard Irwin auger systems, this core rod ensures consistent performance across multiple drilling applications.