GP296 Lawn Mower Mounting Disc for Plastic Blades By ALM - Fits Powerbase

Mounting Disc for Plastic Blades: Replacement blade mounting disc for lawnmowers, these glass re-inforced nylon discs are durable, hard-wearing and will offer a long life span. Simple to replace, these essential discs are at the heart of your mower. The plastic blades (one pair is supplied) are mounted by a keyhole slot mechanism and literally just hook into place as replacements are required.
The life of the blades and disc can be greatly improved by checking over your lawn prior to mowing and removing any stones or large twigs that will potentially cause damage if left there.
Benefits: Quality replacement item, Essential maintenance part, durable, low cost.