Included in delivery: 1 piece of protective pad 150 mm for Hook & loop sanding block, backing pad, sanding pad Suitable for 6-hole, 7-hole, 9-hole, 15-hole system and net abrasives (Mirka Abranet) The protective pad protects the sanding disc of your sanding machine or sanding block from damage and protects the Hook & Loop surface The protective pad is attached to the sanding disc and under the sanding disc using Hook & loop. The service life of the sanding disc is noticeably extended Using a pad saver saves time and money, because changing the sanding disc is more time-consuming and significantly more cost-intensive. The pad saver should be changed regularly.