Bosch 2608597645 auger bits 18mm x 360mm working length x 450mm overall length for use through soft hard and wet wood manufactured specifically for the building industry including roofers joiners and carpenters features of these precision ground 18mm auger bits include high break resistance due to optimised flute geometry fine surface finish and high break resistance ideal for through holes deep drilling and drilling of rafter nails and dowel holes key features wood drilling bits soft hard and w