Includes all taxes
Product size and model table
Product name: C25/C32/C40-ER20/ER25/ER32/ER40 Extension rod
Material : 20CrMnTi Steel
Product Precision: 0.003mm/0.008mm
Product hardness: HRC54°-58°
Applicable Collets: ER16/ER20/ER25/ER32

C25/C32/C40-ER20/ER25/ER32/ER40 Extension rod

Selected 20CrMnTi alloy steel
Vacuum quenching and hardening treatment
Preferred 20CrMnTi alloy steel
Crafted with precision craftsmanship
Not easily deformed, ensuring accuracy
Advanced vacuum quenching furnace
Can achieve co permeation of carbon and nitrogen
Improve the hardness and wear resistance of the tool handle
The interior of the extension rod is solid
Stronger processing rigidity
Extended rod internal through-hole water cooling design,
Beneficial for water cooling,
Effectively suppress vibration and achieve better processing results.
Smooth threads, tightly fitting
Stable processing effect
The threads are smooth and unobstructed,
The extension rod is tightly attached to the nut,
Stable performance, more reassuring processing.
Super long evasive space
Effectively perform deep cavity machining
Small caliber extension rod
Capable of clamping milling cutters for deep cavity machining
Effectively avoiding interference during processing
solve the problem of deep cavity machining for you



Enterprise Introduction
BYGD is located in Dongguan City, Guangdong Province, the mold capital of China,
Is a modern enterprise integrating innovation, research and development, production, and sales.
We are based in Guangdong, facing China, and looking forward to the world.
Our aim is to ensure sales with superior quality and after-sales service with high-quality service.
Create the most cost-effective product to give back to customers.
BYGD - Choose because of quality, recognize because of service.
Delivery process and after-sales
Shipping time:
After receiving the order you paid for, we promise to ship it to you within 3 working days and notify you through Express Express as soon as possible. Please follow our information. If you have any further questions, we will contact you through Express.
Logistics Query:
We will notify you according to the logistics process
Product feedback:
"When you receive our product and it meets your expectations, please use your valuable time to give 5-star feedback. If you have other questions, please contact us in a timely manner, and we will provide you with the best solution in a timely manner.".
If you have any questions about this product, please contact us as soon as possible, and we will answer them online 24 hours a day.
About transportation
We cooperate with all logistics providers in China and will transport the packages according to the logistics you choose. The packages will arrive at the expected time. If the packages are lost, you will be compensated. (Note: Different periods may vary. Please refer to the actual situation announced by the logistics provider.)
Special circumstances can affect the delivery time.
Connection: What are the special circumstances?
BYGD: Including but not limited to: force majeure, customs inspection, policy adjustment, holidays, etc
FQA Company
Payment Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.
1. Accepted Payment Methods
We accept the following payment options:
Major Credit & Debit Cards (Visa, MasterCard, American Express)
Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)
Any additional payment methods displayed during checkout
All payments must be completed in full at the time of purchase.
2. Secure Transactions
All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.
3. Currency
Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.
4. Order Confirmation
Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.
5. Failed or Declined Payments
If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.
6. Fraud Prevention
BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.
Delivery Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.
1. Order Processing
All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.
2. Shipping Times
Estimated delivery times vary depending on your location:
Domestic Shipping: 3–7 business days
International Shipping: 7–15 business days
Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.
3. Shipping Costs
Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.
4. Tracking Information
Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.
5. Delivery Issues
If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.
6. Incorrect Shipping Information
Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.
Refund Policy – BILLIONS BIRDS
At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.
1. Return Eligibility
You may request a return within 14 days of receiving your order. To qualify for a return:
The item must be unused, unworn, and in the same condition as received.
The item must be in its original packaging.
Proof of purchase (order confirmation or receipt) is required.
Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.
2. Non-Refundable Items
The following items are non-refundable:
Final sale or discounted items
Gift cards
Items damaged due to misuse, negligence, or improper care
3. Return Process
To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.
Unless the item is defective or incorrect, customers are responsible for return shipping costs.
4. Refund Processing
Once we receive and inspect your returned item:
We will notify you of the approval or rejection of your refund.
If approved, the refund will be issued to your original payment method within 5–10 business days.
Please note that banks or payment providers may require additional time to process refunds.
5. Damaged or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.
6. Late or Missing Refunds
If you have not received your refund:
Check your bank account again.
Contact your credit card company or payment provider.
If the issue persists, don't hesitate to contact our support team for assistance.
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