【QUALITY MATERIAL】The product is made of stainless steel material, and the surface is electroplated to increase the service life. 【FEEL COMFORTABLE】High temperature quenching heat treatment strengthens the overall hardness, making the product more comfortable to use. 【EASY TO USE】The new plug is detachable, which is convenient for players to replace, can be used as physical electricity experimental teaching aids. 【PRACTICAL DESIGN】There is a cushion at the bottom to protect your desk and equipment from scratches, very practical. 【100% QUALITY ASSURANCE】We are very confident in the quality of this morse code practice key, and provide warranty or refund for it.