I agree -- it's too weak
I tried the basic filing disc attachment. A light pressure does next to nothing. Applying enough pressure to start wearing away the nail causes the device to slow down and finally come to a complete stop. It seems rather toy like. I plan on getting a nail "drill" tool with enough POWER to do something like this one: [[ASIN:B006ZAPMT8 VOGUE PROFESSIONAL brand Powerful Slim Lightweight Pro Nail Art Drill KIT Electric FILE Buffer with 7 Specialty Bits]]
Rating: 2 stars