Kalsten | Adjustable 5-165kg Heavy Grip Strengthener - Finger Expander for Arm, Wrist, and Forearm Training
Enhance your fitness routine with this customizable and sturdy grip strength trainer, specially designed to strengthen your grip strength, wrist stability, finger mobility, and endurance of your forearms. Made from a durable steel spring and featuring an R-shaped design, this device allows for a resistance setting ranging from 5 to 165 kg, making it the optimal choice for both beginners and advanced athletes. Whether you want to increase your grip strength, train finger dexterity, or improve the overall endurance of your arms, this trainer is just what you need to achieve your goals.
Essential reasons why this grip strength trainer is an indispensable part of your fitness equipment:
- Comprehensively adjustable resistance range: With resistance settings between 5 and 165 kg, this trainer is ideal for progressive increases, helping you improve your strength step by step.
- Versatile training: This multifunctional device focuses on hands, fingers, wrists, and forearms, helping you strengthen your grip and arm muscles in just a few minutes a day.
- Compact & portable: Weighing only 367 grams, this grip strength trainer easily fits into your gym bag, making it perfect for training on the go or at home.
- Robust steel spring construction: The durable steel spring guarantees a long lifespan and provides consistent resistance, making it excellent for longer workout sessions.
- Perfect for various activities: Whether at the gym, while making music, or to enhance your athletic performance, this grip trainer supports a variety of fitness goals and training environments.
Whether you are an athlete or a musician, anyone can benefit from improved grip strength and stronger forearms. Enjoy an effective workout tailored to your individual needs with this compact, portable, and highly effective training device. Secure yours today to improve your grip strength and achieve your fitness goals!
Free standard shipping on all orders. No minimum purchase.
- Ships to: United States
- Processing: 1–4 business days (Mon–Fri)
- Transit: 5–10 business days
- Total delivery time: 6–14 business days
- Order cut-off: 5:00 PM PST
You will receive a tracking number by email once your order ships. Please allow up to 48 hours for tracking to update.
See our full Shipping Policy.
You have 14 days from delivery to request a return.
- Email support@open.shop with your order number to start a return.
- Items must be unused, complete, and in their original packaging.
- Return label: flat $9.99 USD, deducted from your refund — nothing to pay upfront.
- Damaged, defective or incorrect items: we cover all return and replacement costs.
- No restocking fees.
- Exchanges: contact us and mention "exchange" — the new item ships once your return arrives.
- Refunds are issued within 7 business days of inspection.
See our full Return Policy.
Questions about your order or our products? We're happy to help.
Open
Hooizolder 214
Drachten Friesland 9205CD
Netherlands
Email: support@open.shop
Customer Service:
Monday to Friday, 8:00 AM – 6:00 PM PST (excluding public holidays)
We reply to all messages within 24 hours on business days. Weekend messages are answered on Monday.
For quick answers, visit our FAQ page or use our Contact Form.