The base is a Vessel 6300 series flathead screwdriver made of chrome molybdenum steel. Total length is approximately 27cm. Paracord and chemical light sticks are not included. - Heated with acetylene gas and bent to approximately 100°, then heat-treated by heating to around 850°C and rapidly cooling. - Sub-zero treatment at -79 degrees Celsius and tempering at 200°C are performed twice, followed by removal of the oxide film and silicon rust prevention treatment. - A 5mm diameter through-hole for paracord is made in the handle, and a 4.5mm diameter hole for inserting a fishing chemical light is made at the tail. (Chemical light sticks and Daiso's 37mm chemical light sticks can be used) Easy to find when you've lost your poking stick! Note) Regarding discounts In addition to the screwdriver body, dry ice for sub-zero treatment, alcohol, liquid oxygen, and acetylene gas are required, which increases the cost. The process also involves multiple steps, and unlike items simply bent with a gas torch, the processing takes several days, so please refrain from requesting discounts. - Steel knives used for food will wear down. Poking sticks used on rocks and gravel will wear down even more, so please sharpen and maintain them with commercially available diamond files, etc., when they become rounded. - When sharpening with power tools such as grinders and sanders, cool with water while gradually sharpening to prevent annealing from heating. - CR-V steel will rust. After use, remove moisture and regularly remove rust to keep it in good condition for a long time. - Shipping is by regular mail (Japan Post). Note) Simple heat treatment explanation from Daiichi Kogyo Co., Ltd. Simply put, it is an operation to "harden and strengthen" the steel. In a slightly more technical explanation, taking the example of steel grades for tools, "Quenching is the process of heating steel (iron and steel) to a temperature of approximately 800°C or higher, as determined for each steel grade, to an austenite state, and then cooling it using a specified cooling method to transform it into a martensite structure. This makes the product extremely hard, and by tempering (reheating) it to a temperature that does not exceed the transformation point, the hardness decreases, and it becomes tough and strong..." This is how it is explained. Steel in the quenched state is hard and brittle, and the structure is also unstable, so it is reheated to around 150-650°C without delay to adjust the hardness, which is called "tempering". By performing this "quenching and tempering", the steel becomes strong and tough.