Hand exerciser with 4-level finger tension adjustment. - Model: AHF-03 - Brand: AROMA - Weight: 74g - Size: Approximately 4.8 x 7.2 x 2.5 cm - Adjustable finger tension: 4 levels (1-4) Thank you for viewing. This product was developed to strengthen piano finger strength and grip. DELLING Hand Trainer Hand Grip Finger Trainer 1.8~3.2KG Adjustable for each finger I bought this on Yahoo! Shopping in 2023 or 2024 and only used it a couple of times for a few minutes before putting it back in the case.