NOT FOR USE ON A LAWN MOWER - THESE ADAPTERS ARE ONLY FOR USE WITH A BLADE BALANCER.

Hole Adapter - Homoko - Single "D" Style (0.635" wide x 3/4" diameter).

Blade hole adapters are for lawn mower blades that do not have a circular hole, these adapters allow you to mount these blades to a MAG-1000 Series Blade Balancer.