Jameson CompositLock™ Poles maintain insulating properties across pole sections for line-clearance tree work PLUS offer more secure pole connection for telecommunication, line clearance, arborist and landscape professionals. Pole Saw Head with CompositLock™ ferrule features a center blade mount and mounting pin. For use with Jameson CompositLock poles. Non-conductive composite ferrules enhance dielectric strength from top-to-bottom, improving user safety while performing tree trimming and line-clearance around overhead utility lines.