Features: These ultra-thin wrenches are only designed with thickness: 6-17mm. It is easier to use in a narrow space, allowing you to reach the fastener in a tight for gaps. The surfaces is chrome plated, corrosion-resistant and rust-resistant. Extended service life. Coupled with the ultra-thin design, it saves you more than half of the space. Make your tool fit more tool s. Widely applicable in industries as bike, motorcycle, Car repair and maintenance, household, machinery and electric power. Specifications: Material: High Carbon Steel Quantity: 5 pcs/set Package Includes: 5x Open End Wrench note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.