Training Club Total length approximately 66cm, weight approximately 1kg (983g) It's heavy and short, so I think it's good for indoor swing practice (please use at your own risk to avoid breaking lights, walls, etc.). Also, the grip is designed to allow for correct gripping. You can also hit balls with it normally (I haven't done so). The swing checker is from another company. Images 11 and 12 show its explanation and usage. It's designed to be attached snugly to your left arm for checking. It's stated not to hit balls with it (actual swing speed is fast and it comes off the arm). Also, be careful when attaching it to the grip, as tightening it too much can cause it to dig in and become damaged as shown in image 7. As it is used, there are signs of use and scuffs. Please refrain from purchasing if you are sensitive about these issues and consider carefully.