About the interchangeable tool head: Strongest roof rake on the market. This snow removal building maintenance IRR-roof rake tool head comes with the IP816-8-16' Inteletool Rubber gripped telescopic pole. 22" wide aluminum. Head assembly required. The Roof rake tool head is designed with corresponding acme threads that thread inside the telescopic pole. How the pole works with the head: When combined with the Inteletool telescopic pole, the tool head attaches and detaches and telescopic pole collapses for easy storage and transport. The Inteletool tool head (male) and the all fiberglass telescopic pole (female) both utilize the ACME thread in combination with a nylon collar lock on the pole to connect the tool heads to the telescopic pole for a secure, permanent feel. The Inteletool telescopic pole features a twist and lock innerlocking mechanism with an external nylon collar lock to prevent the pole from collapsing while in use. There are no predesignated stopping points for length. Can adjust to any desired length. Strongest telescopic pole on the market. Application: roof snow removal, building maintenance. This roof rake tool is designed to be a part of your own custom built tool kit by Inteletool.