Blade bolt protector 10mm hole UN20999-1871
Blade bolt protector cup - fits any straight shaft strimmer or brushcutter and fits under the metal or plastic brushcutter blades to stop the bolt or nut wearing away on the soil and also helps keep the blade at a safe height from the ground,
Note - only lightwieght plastic blades should be fitted to curved shaft strimmers, It is highly dangerous to use a metal blade on a curved shaft machine as the flexible drive shaft is not strong enough and can lead to catastrophic failures and personal injury!
Never use any blade on a strimmer without a suitable guard!
This one fits 10mm bolts and nuts.