The square socket on the general drum tuning key must be turned up to 90 degrees in order to fit it against the square head of the tension rods.

The "Doble Cuatro" socket, on the other hand, has a unique octagon shape and can be rotated up to 45 degrees to fit the head. Therefore, you may feel like the socket is fitting straight when you place it on the tension bolt's head.

The "Doble Cuatro" socket has a flexible 3/8 inch drive. It can be modified into new drum tuning key shapes when used with existing tools like spinners and ratchet adapters.

You can take pleasure in a variety of drum tunings that drummers have never before experienced.

Chrome molybdenum steel was used in its construction. It has a high level of corrosion resistance and is stronger than iron.

It is also much more durable than regular drum tuning keys because it was made for industrial use.

It is undoubtedly constructed to withstand the rigorous use of professionals like drum builders and techs.

The T-handles on current 3/8 inch drives typically have long bars. As a tuning key, it is challenging to use.

In order to focus on tuning drums, the "Doble Cuatro" T-handle is small in size.

The length of the bar was chosen based on ergonomic data to cover the adult thumb's entire length from the thenar.

The handlebar can also be used as an L-shaped tuning key because it slides left and right. In a bass drum, the handle can also be slid to avoid objects near the tension rods.

When used in a T-shape, the bar is stable due to its indent and fixed centre.

Oval-shaped handle bars are easier to grip and prevent the sliding drive part from turning around the bar.

Additionally, to enhance grip comfort, the handlebars that come into direct contact with the skin are beautifully chrome-plated.