The product is a set of four steel wrenches manufactured by Fuller and Master Mechanic. The wrenches are open-end and metric, with sizes ranging from 12mm to 19mm. The set includes 12/14mm, 14/15mm, 13/15mm, and 17/19mm wrenches. These tools do not come with a warranty. The set is ideal for automotive or general mechanical tasks that require a range of sizes.