How to Use Copper Sleeves for Fishing

Copper sleeves have become an increasingly popular tool among fishing enthusiasts, aiding in enhancing their fishing experience and optimizing their fishing gear. These innovative pieces of equipment, crafted from premium-quality copper material, offer a myriad of benefits, ranging from increased sensitivity to improved durability. Furthermore, these versatile accessories can be seamlessly incorporated into various fishing techniques, further accentuating their significance in the angling community.

What Size Are Crimps for Fishing?

The size of crimps for fishing can vary depending on the type of crimping tool you’re using. Standard duty cup-to-cup crimping tools typically have a capacity to accommodate oval sleeves up to 2.2 mm in diameter. This should be sufficient for most recreational anglers using monofilament fishing line.

Monofilament fishing line, also known as mono, is made from a single fiber of plastic material. It’s a popular choice among anglers due to it’s simplicity and versatility.

For most recreational anglers, standard crimp sizes that can accommodate oval sleeves up to 2.2 mm in diameter should suffice. These crimps are typically strong enough to secure the line to the leader, ensuring a reliable connection between your mainline and terminal tackle.

How to Choose the Right Crimp Size for Different Fishing Applications

  • Consider the type of fishing line you’ll be using, such as monofilament, fluorocarbon, or braided line.
  • Determine the breaking strength or pound test rating of your fishing line.
  • Consult a crimp size chart or guide specific to the type and size of line you’re using.
  • Select a crimp size that matches the recommended range for your line’s pound test rating.
  • Ensure that the crimp size and style you choose is suitable for the type of terminal tackle you’ll be using, such as swivels, hooks, or snaps.
  • Consider the overall size and weight of your fishing rig and the species you’re targeting.
  • Practice crimping techniques with different sizes to determine which crimp size provides the strongest and most reliable connection.
  • Take into account any specific recommendations or preferences from experienced anglers or fishing guides.
  • Regularly inspect your crimps for signs of wear, corrosion, or damage, and re-crimp as needed to maintain optimal strength and performance.

Crimp sleeves or fishing crimps are essential tools used in fishing to connect a leader to various fishing lines such as monofilament, wire, cable, or fluorocarbon. These small cylinders with open ends serve as secure connectors, ensuring a strong and reliable connection between the leader and the fishing line.

What Are Fishing Crimps For?

Fishing crimps serve a crucial purpose in fishing tackle. They’re specifically designed to securely connect a length of leader to various types of fishing lines, such as monofilament, wire, cable, or fluorocarbon. These crimp sleeves are small cylinders with open ends, allowing them to be easily slid onto the fishing line and crimped using a crimping tool.

When properly crimped, they create a firm hold that significantly reduces the chances of the line breaking or the leader getting detached during a catch. This is especially important when targeting large and powerful fish that put a tremendous amount of strain on the fishing gear.

They allow for quick and easy changes of leaders, enabling anglers to adapt to different conditions, such as water clarity or the feeding behavior of fish. This versatility is particularly useful when fishing in saltwater environments, where having the right leader setup can greatly increase the chances of success.

They offer a strong, reliable, and customizable connection between the fishing line and leader.

Differences Between Crimping and Knot Tying for Connecting Leaders to Fishing Lines

  • Crimping is a method of connecting leaders to fishing lines using a crimping tool.
  • Knot tying involves using various types of trusted fishing knots to secure the leader to the fishing line.
  • With crimping, the leader is inserted into the crimp, and the crimping tool is used to compress the crimp, forming a tight connection.
  • Knot tying involves creating intricate knots, such as the Uni knot or the improved clinch knot, to create a secure connection between the leader and the fishing line.
  • Crimping is often preferred for heavy-duty applications, such as offshore fishing, where strength and reliability are crucial.
  • Knot tying is considered more versatile and offers a wider range of knot options to suit different fishing conditions and line types.
  • Crimping can be quicker and easier to perform once you’re familiar with the process and have the necessary tools.
  • Knot tying requires manual dexterity and practice to achieve reliable and secure knots.
  • Both crimping and knot tying have their advantages and disadvantages, and the choice depends on personal preference, fishing conditions, and the desired level of strength and reliability.

When it comes to crimps for fishing, there are three main types to consider: round, oval, and double barrel sleeves. Round crimps are the least desirable due to the need for a cup to point crimp, which puts pressure on a single point of the line. On the other hand, oval and double barrel crimps offer better quality as the cup to cup crimper evenly deforms the sleeve around the line.

What Are the Different Types of Crimps for Fishing?

Round crimps are the simplest and most basic type. They’ve a rounded shape and require the use of a cup to properly crimp them onto the fishing line. However, this type of crimp puts pressure on a single point on the line, which can weaken it and increase the risk of line failure.

Oval crimps are a step up in terms of quality. They’ve a slightly oval shape and can be easily crimped using a cup to cup crimper.

Double barrel crimps are similar to oval crimps in terms of quality. They consist of two separate sleeves that can be crimped onto the line using a cup to cup crimper. This type of crimp provides added security, as it creates an even stronger connection compared to round or oval crimps.

Using the appropriate crimp will ensure a secure and reliable connection between your line and terminal tackle, ultimately increasing your chances of landing that big catch.

Source: Fishing 101: How to make a proper Crimp for fishing

Watch this video on YouTube:


They provide numerous benefits such as added strength, improved sensitivity, and protection against corrosion. Whether it’s for rigging, leader connections, or line repairs, copper sleeves are a valuable addition to any angler's toolkit. Happy fishing!

Scroll to Top