Home » Products » Lawn & Garden » STIHL KM Extension Not sure what you need? Come see us in store! We have locations in Kelowna and Vernon. STIHL KM Extension $99.95 CAD SKU : 41407107131 Pricing on website is subject to change or product availability. Extension for pole pruner and hedge trimmer KombiSystem attachments. Extends shaft by 37” for more reach.