The Bostitch SB-HC50FN Pneumatic Concrete Block Nailer - 20-50mm Nails is a 15 gauge finish nailer, which is capable of driving high carbon zinc dichromate hardened nails into concrete blocks to 7 newtons. Designed to drive tungsten hardened nails into almost all forms of concrete block, the SB-HC50FN can fix door liners into block and gripper rods into floor screeds. It is not recommended that this tool is used to drive nails into any form of strengthened concrete or engineered and glazed bricks. It fires 20-50mm nails and has a maximum magazine capacity of 100 nails. Its driving power is 295in/lb and its pressure is 70-100psi (5-7bar).