DeWalt Adapter Kit - New Porter Cable (Sq. Pins) MultiToolBlade.com
DEWALT 20-Volt MAX XR Cordless 3-speed Brushless Oscillating Multi Tool DCS356B - Walmart.com
DEWALT 6-Piece Brushless 20-volt Max 3-speed Oscillating Multi-Tool Kit with Soft Case (1-Battery Included) in the Oscillating Tool Kits department at Lowes.com