The house and my shop have there annual coating of cobwebs but the 6 foot pole that is available for the brush shown would not reach so since I have 3 5foot fiberglass poles I thought it was worth making an adapter. The standard broom stick thread is 3/4" - 5 1/2 but the brush is under sized at about 11/16" - 5 1/2 so the only choice was to make one out of Hornbeam and that meant making a router bit for an acme thread. Now proceed to the next post.