This chainsaw from Sealey is part of the SV20 Series. These heavy-duty, high performance, durable tools are designed for the professional Lightweight composite designs for superior control and comfort. Operates using 2 x 20V batteries from the Sealey SV20 Series (batteries must be of the same Ah rating). Tool-less chain tensioning and built-in chain lubrication. 2-Stage operation and automatic cut-off for safety whilst working. Oregon chain and bar set.