The Irwin Cordless Multi-Purpose Drill Bits have been designed for cordless, low speed multi-purpose drilling. They offer around 10% extra battery life per charge. They have a four-facet ground carbide tip for lower drilling pressure and better centring and allow for combined drilling into wood and brickwork: the Cordless Drillbit is excellent for such drilling jobs - where you drill through wood into brickwork. Only one drillbit is needed to do the job and will drill a wide selection of different materials like:BrickworkCeramic TilesBreeze BlockWoodDry WallGypsum BoardLimestoneSlateMarbleEternitePlastics/Reinforced plastics.Length: 95mm Diameter: 5.5mm Flute Length: 49mmAdditional Information:• Diameter (mm): 5.5• Working Length (mm): 95• Overall Length (mm): 49• Pack Qty.: 1