I bought these off a diff site but used them on a shihtzu maltese mix 1 yr old puppy.........they look durable but broke after the 4th nail.. I've also taken it apart and reassembled it but still doesnt work (the problem is whenever I try to cut a nail it doesnt cut it just gets caught between the steel edge and the black metal part with the hole. Piece of junk......don't waste your money on it