This 10 inch chainsaw chain is made up from 39 drive links and would be suitable for replacing broken or damaged chainsaw chains.this replacement chainsaw chain is genuine oregon type 91 chain. Oregon chains are reliable and durable, and chain type 91 reduces kick back and vibration and is easy to maintain.made from chain type 91 3 8 91 1.3mm 0.50suitable for the following modelsblack deckercs30, cs35, dn400, dn401, dn402, dn404, dn412, dn416, gk425, gk330, gk310, gk1935, gk320, gk321, gk322, gk35, gk330, gk430, gk435, gk440, gk535, gk540, gk1440, gk1630, gk1635, gk1640, gk1940,dn301, dn302oregon type 91 chamfer chisel equivalent to carlton n1c, stihl picco micro, duro, super, stihl 63pm, husqvarna h43x, em s43x, windsor 50r, homelite 35 m50, gb sabre, tsc, excel 357, dolmar 92.