It's a solid home use tool with a weighty metal base, smooth pivot action, and all metal construction. (Except the pads of course.) the wide selection of nylon pads included to fit almost every watch case I have. I have also used it to press replacement watch crystals into place. Key points for novices: 1. Smooth gentle pressure. The leverage dramatically increases your force. 2. Clean mating surfaces. Make sure you thoroughly clean all parts you are working on. 3. Correct selection of the nylon pads to conform to the shape of the watch case, don't press on the crystal.