The CS299MXL2 pneumatic underpinner from Cassese joins moulding up to 6” wide. Patented retractable “hold & push” dual action inside clamps push moulding together for a tight corner. All pneumatic machine no electrical connection required. Nailing head locks in place to allow stacking of nails. The Smart Wedge Drive System™ eliminates need to adjust top clamp placement or change air pressure between soft and hard wood.