Although it was very easy to use and loved it, the mouth that bite the sandpaper is broken while using it is troublesome to detach, and if you use it it gets worse and becomes useless. Usability is good, but it is a consumable item.
I thought that it was a leading manufacturer but I purchased it but I was disappointed. Hairline will be disturbed as the handle moves rattling without tightening. The pad lock button was stopped with thin plastic, it got cut and it came tightly. I changed it to a simple and fragile product now.