What's the difference between a hook and a welded D-ring?

Look closely at any restraint bed and you'll find one of two shapes where the restraints attach: an open hook or a closed ring. The difference looks small. It shapes how restraints are attached, how the points are checked, and the questions worth asking before you buy, so it's worth understanding whichever maker you choose.

What a hook is

A hook is an open shape. A strap, cuff or connector is placed over it or into it, and comes off the same way. Hooks are quick to use and easy to see, and they can be fitted to a frame in several ways, from being built into the structure to being screwed or bolted on afterwards.

Makers who use hooks have their reasons, and a good one will explain them clearly. If a bed you like uses hooks, the questions to ask any maker apply just as much.

What a welded ring is

A D-ring is a closed loop of steel, shaped like the letter D, with a flat side and a curved one. Nothing can be placed over a closed loop. Instead, a connector such as a clip is passed through it, and opened again to release it.

On our frames, each D-ring is welded to the steel of the frame, which makes each restraint point part of the frame itself.

Why we use welded D-rings

We chose welded D-rings for three reasons that matter to the people using our beds.

The first is that a closed shape means a deliberate attachment. A connector goes through the ring and is opened to come off, so attaching and releasing are both clear, conscious actions that you can agree on and practise in advance.

The second is that welding joins each ring directly to the steel of the frame, so the ring and the frame are checked together. Look over the frame, its fixings and each ring before each use, as you would with any piece of restraint furniture.

The third is appearance. A welded ring is finished in the same colour as the frame. Between scenes it reads as part of the bed's design, which helps a restraint bed stay an everyday bed.

Restraints that suit closed rings

Because a closed ring needs a connector that opens, the restraints you choose should have one. Cuffs with a loop of their own, joined to the ring with a clip that opens with one hand, are one straightforward option.

Whatever you choose, practise attaching and releasing every connector before you use it in a scene, until both of you can do it without thinking. Keep safety shears within reach of the partner leading, and never leave a restrained person alone. Our guide to which restraints work with welded rings covers cuffs, straps and connectors in more detail, and our guide to rope and a steel frame covers rope.

What fixed points mean for negotiation

Restraint points that belong to a frame stay in the same place every time, and that has a benefit beyond the hardware. When you negotiate a scene, you're talking about specific points on a specific bed, so you can be precise about which will be used, what will be attached to each, and how each will be released.

You might write that down: a short note of which points you've agreed to use and how, kept with the restraints. It makes the next conversation quicker, and it means nothing about the set-up is improvised on the night. If either of you wants to change the arrangement, that's a new conversation, held beforehand and sober, like the first.

How the rings are finished

Each ring on our frames is coated along with the frame, in Obsidian, Oxblood, Gilt, Chalk, Forge Clear or any RAL colour. That keeps the ring in the same finish as the posts and rails, and means it cleans the same way: warm water and mild soap, then a soft dry cloth.

The finish around a ring is handled more than most of the frame, because connectors pass through it. Take restraints and connectors off the rings when a scene ends, so no metal is left hanging against the finish, and include the rings in your checks before each use.

Questions to ask any maker

Whether a bed uses hooks or rings, these questions separate restraint points that belong to a frame from ones that have been added to it, and a maker who designed for restraint will answer them readily.

1. Is each point a closed ring or an open hook, and why did you choose it?
2. How is each point attached to the frame: welded, built in, bolted or screwed?
3. Is the point part of the frame's structure, or attached to a decorative part of the bed?
4. Where do the points sit on this particular frame?
5. How is the area around each point finished, and how should it be cleaned?
6. What should I check before each use, and who do I contact if something looks wrong?

For our frames: welded D-rings, S235 steel in 80 × 80 mm square tube, and a coated finish that wipes clean with warm water and mild soap. For where the rings sit on a particular bed, ask us.

How many restraint points does a bed need?

There's no single number that suits everyone. Whether a frame suits you depends on what you and your partner have agreed, the size of your mattress and how you use the bed. Tell us what you're planning and which frame you're considering, and we'll talk you through it. If none of our frames suits what you need, our bespoke service can design around it: a brief and measurements first, then scaled drawings, and nothing made until you've approved those drawings and the quote in writing.

Checking restraint points before each use

Every restraint point, of either kind, deserves a look before each scene. The check belongs to the same routine as checking the frame and its fixings.

• Look at each ring and the weld where it meets the frame.
• Look at the finish around each ring for chips that go through to the steel.
• Check that the frame's fixings are tight and nothing has moved.
• Check your restraints and connectors too: stitching, buckles, clips and anything that opens.

If anything has moved, loosened or chipped through to the steel, stop using the bed and contact us before it's used again. Our care guide and our guide to cleaning and caring for steel restraint furniture set out the full routine.

Before you use any restraint point

The conversation beforehand matters more than any hardware. Start from consent: a yes that's freely given, informed, specific, ongoing and withdrawable at any moment, reached sober and kept sober through the scene. Decide how each restraint will be released before anything is attached, and settle on a safeword and a non-verbal signal. Either one ends the scene immediately, and neither is ever discussed or overridden in the moment. The step-by-step version is in what to agree before using restraint furniture.

Each frame on our BDSM beds page uses welded D-rings and is made to order, with a current lead time of 8–14 weeks. For a wider introduction, read what is a BDSM bed?