The 5" Sanding Interface Pad should be mounted between the face of the dual action sander and the sanding disc itself, as shown below.
LRSRP5ETNHIFP-1 (EACH) 5'' SANDING INTRERFACE PAD (EACH)
SET INTERFACE PAD 6" + SANDING SUPERFINE DISC 6'' - GRIT 1500/2000/3000 5 PCS EA
Mkobon 4 Pack 5 Inch 8 Holes Foam Sanding Pads, Soft Density Interface Pad,...
4 Pack 5 Inch 8 Holes Foam Sanding Pads, Soft Density Interface Pad, Hook...
TPSUIPA 6 Pack 5 Inch 8 Hole Foam Sanding Pads, Soft Density Interface Pad, Hook
TPSUIPA 6 Pack 5 Inch 8 Holes Interface Pad, 5” Orbital Sander Foam Pad for...
