The Strike Magazine Follower for 12-Gauge Shotgun has a spiral fluting design for self-cleaning to enhance reliability. With the anodized process on the aluminum surface, the follower slides smoothly inside the mag tube. This lightweight and high-strength Strike Magazine Follower is machined from 6061-T6 aluminum and is a drop-in installation. The Strike Magazine Follower for 12-Gauge Shotgun is compatible with many of the popular shotguns on the market and will provide a smooth sliding, self-cleaning and reliable upgrade.