Types of Shackles
Shackles are the workhorse of lifting and rigging, but "shackle" is not one product: it is a family of shapes and pin types, each built for a different load. Using the wrong one can mean a failed lift. This guide walks through the main types of shackles and how to choose the right one.
What Is a Shackle?
A shackle is a U-shaped or O-shaped metal connector with a pin or bolt across the opening. It links slings, chains, ropes and lifting points together. Shackles are forged from carbon steel or stainless steel, and every shackle carries a working load limit (WLL) you must not exceed. If you need help with sizing, see our shackle size chart.
Bow Shackle (Anchor Shackle)
A bow shackle has a wide, rounded "O" shape, which gives the sling or hook room to move and lets the shackle take loads from several directions at once. It is also called an anchor shackle. Use a bow shackle for general lifting, multi-leg slings, and any job where the load direction may change. See our US type bow shackle for a standard screw pin example.
Dee Shackle
A Dee shackle has a narrow "D" shape with straight sides. It is designed for a single, straight-line pull, where the load always comes from one direction. Dee shackles are lighter for the same WLL and are common on single-leg slings. See our US type Dee shackle.
Screw Pin vs Bolt Type
The pin closes the shackle, and there are two common designs. A screw pin shackle threads in by hand and is quick to fit and remove, which suits jobs that are rigged and re-rigged often. A bolt type shackle uses a nut and often a cotter pin, and is better for permanent or long-term connections and heavy load cycles.
Other Shackle Types
- Chain shackle: a long, narrow opening made to connect chain links in a straight line.
- Swivel shackle: a swivel eye lets the load rotate without twisting the sling.
- Clevis shackle: a clevis-style pin for clean, straight-line pulls.
How to Choose the Right Shackle
- Calculate the maximum load, including shock loads.
- Choose a shackle whose WLL meets or exceeds that load.
- Pick the shape by load direction: bow for multi-direction, Dee for straight-line.
- Pick the pin type by how often you rig and de-rig.
- Match the material to the environment: stainless steel for marine or outdoor use.
FAQ
What is a shackle used for?
A shackle connects slings, chains, ropes and hooks during lifting and rigging. It is the standard connector between a load and the lifting equipment.
What is the difference between a bow shackle and a Dee shackle?
A bow shackle has a wide rounded opening and takes loads from multiple directions, while a Dee shackle has a narrow D shape for a single straight-line pull.
What is the strongest type of shackle?
Strength depends on size, material and grade rather than shape. A bow shackle and a Dee shackle of the same pin size carry the same WLL, but a bow shackle is safer when the load direction may change.
Browse Our Shackles
SolidLink forges bow, Dee, anchor, chain and other shackles in carbon steel and stainless steel, with WLL marked and certificates available. Browse our shackles category or contact us for a quote.
