Dremel MM40-05 Multi-Max 3.8-Amp Oscillating Tool Kit with Quick-Lock Accessory Change Interface and 36 Accessories High-performance 3.8 Amp motor for the most demanding applications Quick-Lock for tool-less and secure accessory changes Quick-Boost - maintains constant speed throughout toughest applications and materials Quick-hold - magnetic flange holds the accessory in place for easier accessory changes Up-front on/off switch  for one-handed use and maintains speed setting