Me agrada todo solo una Cosa que el tiempo no timbre cuando se acaba la session tienes que estar Chenango El tiempoThese tips are so wonderful. I have been using them for the longest time and they never wear down or lose their ability to do a great job! They are of wonderful quality and fit my Dermabrasion machine by Lancer perfectly. They fit tight with no slippage and do a marvelous job with the machine.I would highly recommend!First, these tips fit my machine. I have a Kendal HB-SF01. The tips screw on easily and work perfectly.I like the assortment of six tips for different types of treatments. Depending on the tip and the amount of suction you use, your face may become a bit red after the treatment. It goes away soon, leaving soft, smooth skin behind.After a treatment, my face looks and feels better. I love this when I feel my skin starting to get rough. With these tips, you can choose the right grit and size to work on any part of your face.You do have to replace the tips from time to time. When you do, these are a good choice.Totally forgot how important it is to change this tips out on my at home microdermabrasion pen! Feeling the new ones I’m like wow, my original isn’t doing anything for me anymore. They work great, as they’re intended to and I like that it’s a pack of more than one!