M4500B (Replace M4500G)
Tool-less blade clamp allows users to quick install or remove the blade of the reciprosaw by simply turning the lokcing mechanism 
Tool-less shoe adjustment allows position to be adjusted simply by pressing a button, adjusting to desired length and locking back in place
Large trigger switch allows users to easily and conveniently choose the speed at which the recipro saw works depending on their needs and preferences
Dust and drip proof design and gearing