The brush and strimmer accessory are designed for the 2 in 1 extendable reach petrol chainsaw and hedge trimmer if you buy these you will make it a 4 in 1 featuring quick change heads a 255cm 10in dia hardened steel brush cutting blade for tougher undergrowth and a separate heavy duty strimmer head supplied with 2m line both with debris guards attachments measure 89cm 35in long