Super Duty Series 5000 Telescopic Pole with Outside Lock (8 to 16 Foot) For over 50 years, Skimlite has been dedicated to supplying top of the line equipment made 100% in the USA. Skimlite believes products should be made to last. Quality pays for itself! Customers love the simplicity of this external locking pole and its heavy wall tubing. It is among the pool industry favorites. The Outside Lock has been an industry favorite since 1959. The locking system is made of the strongest plastics ever made. The female and ferrule fittings are easily replaced when worn. The nylon male fitting is pressed onto the outside tube with a ton of pressure, so it will not fall off.