





Guyker GKS1000-GKS4000 Double-Locking Tremolo with Lock Nut for 6-String Electric Guitar
SKU:GKS4000-42
PRODUCT DESCRIPTION
Upgrade your compatible 6-string electric guitar with a complete double-locking tremolo system. The Guyker GKS1000-GKS4000 includes a double-locking tremolo bridge assembly, matching locking nut, and mounting hardware for locking tremolo replacement, upgrade, or custom build projects.
Key Features
- Double-locking tremolo system: Designed to lock the strings at both the bridge and locking nut for stable tremolo performance on compatible electric guitars.
- Matching locking nut included: Available with 42 mm and 43 mm locking nut size options to match different neck requirements.
- 304 stainless steel baseplate: Built with a 304 stainless steel baseplate for durable tremolo bridge construction.
- Mixed metal hardware construction: Features zinc alloy saddles, an iron tremolo arm, and a brass string block.
- 10.6 mm string spacing: Designed for compatible 6-string electric guitars requiring 10.6 mm string spacing.
- Fitment reminder: Please verify your locking nut width, locking tremolo route, string spacing, bridge footprint, block height, post size, and mounting layout before ordering.
Technical Specifications
| SKU / Model | GKS1000-GKS4000 |
| Product Type | Double-Locking Tremolo Bridge Set |
| Bridge Type | Double-Locking Tremolo |
| Suitable For | Compatible 6-String Electric Guitar Locking Tremolo Installations |
| Baseplate Material | 304 Stainless Steel |
| Saddle Material | Zinc Alloy Saddles |
| Tremolo Arm Material | Iron |
| String Block Material | Brass String Block |
| String Layout | 6-String |
| String Spacing | 10.6 mm |
| Locking Nut Size Options | 42 mm, 43 mm |
| Block Height | 34 mm |
| Block Size | 50 mm x 34 mm x 8 mm |
| Overall Width | 91.5 mm |
| Top Width | 67.5 mm |
| Overall Height | 70.7 mm |
| Mounting Screw Spacing | 74.04 mm |
| Color / Finish Options | Chrome, Black, Gold, Rainbow |
| Package Includes | 1 x Double-Locking Tremolo Bridge Assembly, 1 x Locking Nut, 2 x Pivot Posts, 1 x Spring Claw, 4 x Tremolo Springs, 2 x Hex Wrenches, 1 x Mounting Screws Set |
Compatibility Notes
Important: Please check the measurements of your guitar before ordering. Locking nut width, locking tremolo route, string spacing, bridge footprint, block height, post size, and mounting layout may vary by guitar model, production year, or existing hardware.
Package Includes
- Complete double-locking tremolo hardware set:
- 1 x Double-Locking Tremolo Bridge Assembly
- 1 x Locking Nut
- 2 x Pivot Posts
- 1 x Spring Claw
- 4 x Tremolo Springs
- 2 x Hex Wrenches
- 1 x Mounting Screws Set
Installation Note
Before installation: Compare the selected 42 mm or 43 mm locking nut size, 10.6 mm string spacing, 91.5 mm overall width, 70.7 mm overall height, 74.04 mm mounting screw spacing, and 34 mm block height with your original locking tremolo system and guitar route to confirm compatibility.
Size Reference

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FAQS
Do you class a reverse headstock guitar as a left hand guitar?
How do I determine the right size/fit for a specific accessory?
Can you provide more details about the materials used in your products?
At Guyker, we prioritize the use of high-quality materials to ensure the durability and performance of our products. While the specific materials used may vary depending on the accessory, we commonly utilize materials such as:
■ Metals: We often use materials like stainless steel, aluminum, and brass for hardware, bridges, and other metal components.
■ Plastics: Certain accessories may incorporate durable and impact-resistant plastics such as ABS or polycarbonate for knobs, pickguards, and other components.
■ Woods: Some accessories, like guitar knobs or picks, may be made from various types of wood, including rosewood, ebony, or maple.
For more detailed information about the materials used in a specific product, we recommend reviewing the product descriptions or reaching out to our customer support team at [support@guyker.com] for further clarification.
Do you offer international shipping?
Yes, we offer international shipping to customers worldwide. When placing your order, please ensure that you provide accurate international shipping information, including your complete address and contact details.
Please note that international shipping may be subject to customs duties, taxes, and additional fees imposed by the destination country. These charges are the responsibility of the recipient and may vary depending on the country's customs policies.
What is your process for returning or exchanging a product?
To initiate a return or exchange, please follow these steps:
■ Contact our customer support team at [support@guyker.com] or visit our website's Returns/Exchanges page.
■ Provide your order details and the reason for the return or exchange.
■ Our customer support team will guide you through the process and provide you with a return/exchange authorization if applicable.
■ Follow the instructions provided, including packaging the product securely and attaching the necessary labels or documentation.
■ Ship the product back to us using a traceable and insured shipping method.
■ Once we receive the returned product and verify its condition, we will process the return or exchange accordingly.
Can I return or exchange a product if it's been used?
In most cases, products that have been used or show signs of wear may not be eligible for return or exchange unless there is a defect or error on our part. We recommend reviewing our specific return/exchange policy or contacting our customer support team at [support@guyker.com] to determine the eligibility of your particular product.
Do I need to cover the return shipping costs?
The responsibility for return shipping costs may vary depending on the reason for the return or exchange. In some cases, such as if the product is defective or if we made an error, we will provide a prepaid shipping label or reimburse your return shipping costs. However, if the return or exchange is due to a change of mind or a non-defective product, you may be responsible for the return shipping costs. We recommend reviewing our return/exchange policy or contacting our customer support team at [support@guyker.com] for specific details regarding return shipping costs.

Guyker GKS1000-GKS4000 Double-Locking Tremolo with Lock Nut for 6-String Electric Guitar
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