Our universal fit OPEN-LOK™ 3-1/2 in triangle sanding pad one pack is for oscillating multi-tools. The Milwaukee® 3-1/2 in triangle sanding pad utilizes hook and loop technology for fast and secure paper changes. The sanding pad uses a dense foam backer for flexibility and durability, delivering you a longer pad life and a smooth sanding experience. This multi-tool sanding pad is ideal for detail sanding and hard to reach areas.