【Material】: This Diving Inline Regulator Adjustment Tool is made of Nickel Plated Brass, ensuring its durability and strength for long time use. 【Application】: The adjustment tool fit for most modern designs 1st stage and 2nd stage regulator which is adjust by flat slot drive. 【Easy to Use】: Calibration tool simply connect the adjustment tool inline between the 2nd stage regulator and the low pressure hose for easy adjustments. 【Essential Accessory】: This adjustment tool is a must have for any scuba diving enthusiast, good for maintaining and adjusting your first stage and second stage regulator. 【Package Includes】: Each package comes with a Regulator Adjustment Tool, ensuring you have everything you need to keep your equipment in top shape. Specification: Material: Nickel plated copper Size Chart:1.8cmx8.3cm/0.71inchx3.27inch Package Includes: 1 Diving Regulator Tool Note: Please allow slightly errors due to manual measurement and different .