General description The Sealey AK641 Oil Filter Chain Wrench is designed for heavy-duty use, featuring a robust satin finished carbon steel body. It is equipped with a 1/2" square drive, making it compatible with ratchet wrenches and suitable for tightening oil filters up to 120mm in size. Technical specifications Material: Satin finished carbon steel Drive: 1/2" Sq Capacity: Up to 120mm Compatible with: 25mm spanner Usage Designed for use with ratchet wrenches Can also be used with a 25mm spanner