The Notch Sentei is a telescoping aluminum pole saw with a 390 mm (15.4 in) Silky Hayauchi blade, made in 16 ft and 21 ft versions for pruning high limbs from the ground. We use one around our own campus.
The oval pole gives you better control of the blade's direction at full height. Cam collar locks with rib lock protection hold each section, and the saw head connects without tools. The aluminum is light and rigid, and the grip is low profile and abrasion resistant.
The curved, chrome-plated blade has 5.5 TPI teeth, an upper sickle for cutting vines and a lower sickle for undercutting the bark for a clean cut. A scabbard is included. Replacement blades and head assemblies are stocked here.