Precision-machined gears with all ball bearing construction. 11.5A heavy-duty motor. Electronic variable speed 0-2600 SFPM. Keyless Quik-Change blade clamp allows blade change in seconds without a wrench. Rotating back handle for better leverage. Full 1-1/8" stroke. Cutting action can be changed from reciprocating to orbital. Upside down blade usage. Pivotal front shoe. 10' rubber power cord.