World's no.1 saw chain. LubriTec oiling system. 40. Black+Decker. Echo. Craftsman. Ryobi. Husqvarna. R40: Look for the Gold-Colored ID link that shows the exact-fit replacement saw chain part number to reference next time you buy a saw chain. R40. 4.5 mm; 11/64 inches. 5/32; 4.0 mm. Black+Decker LCS1020 20-Volt. Craftsman 315.341300, 315.34131, 79240 Pole Saw, 79245 Pole Saw, 79246 Pole Saw. Cub Cadet Pole Saw PS26. Echo CS-271, CS-271T. Husqvarna 436Li, 536LiXP, T536LiXP. Kawasaki KMPO1A Multi Task Pole Pruner. Ryobi CS1800 18 Volt Cordless, P540, P540A, P540B P542, P543, P545, P547, RY52003, RY52003A, RY52604, RY52907, TP30, ZR15520 Expand-it-Pruner. Troy-Bilt PS720r, Dura-Lite Pole Saw. Worx: WG323.