Maximise the potential of your drill driver. The Bosch GHA FC2 FlexiClick Rotary Hammer Adaptor converts a Bosch GSR 14.4V-FC2 or GSR 18V-FC2 drill driver into an SDS+ rotary hammer drill. This accessory makes drilling into concrete possible up to 10mm diameter. Part of the Bosch FlexiClick 5-in-1 System, this SDS+ holder offers fast drill bit changing. It locks securely with a single click. Drilling capacity 4mm to 10mm.