Deli Universal Self-Adjusting Wrench - 2 Piece Set

The nut is there. The right spanner is back at the shed.

You are halfway up the paddock with a fitting to undo and the spanner roll is sitting on the bench at home. So you make do — shifter jammed on at an angle, multigrips, a pair of pliers — and you round the corners off a nut that was perfectly good ten minutes ago. Now it is not a five minute job. It is a trip to town for a stud extractor and an afternoon you have lost.

These are self-adjusting wrenches. A spring-loaded jaw pulls onto the flats as you take up the load, so one tool covers a band of sizes instead of one size. They go in a glovebox, a crib bag, a tank bag or a toolbox lid, and they are there when the right spanner is not.

Be straight about what that buys you. A self-adjusting jaw grips on fewer points than a ring spanner or a socket, so this is a convenience tool for light and awkward work — not the thing to reach for on a seized nut. The supplier states no torque figure for these and we are not going to invent one. Every tool in the gallery is stamped deli; you will also see this style sold generically as a snap-and-grip wrench.

What It Does

• Covers a band, not a size: the jaw closes onto whatever sits inside its range, so one wrench replaces several fixed spanners in a bag you have to carry.
• Self-locks under load: the harder you pull, the harder the sprung jaw bites. Let go and it releases.
• Works one-handed: no thumbwheel to wind, so you can hold the fitting with the other hand.
• Grips round as well as flat: the serrated faces bite pipe and round fittings that a normal open-ender just slips off.
• Metric or imperial, no difference: it grips whatever across-flats size falls inside the band, so an odd AF nut is no drama.
• Doubles as a pry tail: on the Pointed End option, the tapered tail is made for prying and scraping.

Key Features

• Two wrenches per set: every option on this page is a two-piece set — a small one and a large one, not a single tool.
• Jaws from 6 to 63 mm: across the three options the sets cover 6–22 mm, 22–32 mm, 14–30 mm and 30–63 mm. Check the Specs tab and pick the band you actually need.
• Spring-loaded self-adjusting jaw: the moving jaw is riveted on a pivot and returns on a spring, so it resets between fasteners.
• Serrated gripping faces: the supplier calls it a shark tooth pattern and offers it single sided or three sided.
• Rubber over-moulded handle: a moulded grip over the steel shank, with a hanging hole through the end.
• Chisel and pry tail: the Pointed End set carries a flat tapered tail the supplier describes as a chisel and pry point.
• Deli models sighted: DL1421KB, DL1422KB and DL1423KB are printed on the tools in the product photographs.
• Stated hardness: the supplier's own panel claims up to 50 HRC. That is their figure, not a measured one.

Limits

It will not replace a ring spanner or a socket. A self-adjusting jaw grips on fewer contact points than a six-point ring or socket does. On a tight, rusted or already-rounded fastener it can slip, and when it slips it takes the corners off. If the nut is seized, reach for the right size ring spanner, a socket and a breaker bar, or heat. Not this.

No torque rating is stated. Nothing on the supplier's artwork gives a maximum torque, and no certificate was supplied. We will not put a number on it. Treat these as tools for light and awkward work where the correct spanner will not fit or is not with you.

"Universal" means a band of sizes, not every size. Each option is a two-piece set covering a stated range, and there are real gaps between them. The single and double sided teeth sets stop at 32 mm. Nothing on this page reaches past 63 mm, and nothing goes below 6 mm.

The teeth mark what they grip. The serrations are the reason it does not slip, and they will leave witness marks. Keep them off chrome tapware, plated fittings, polished shafts and anything soft you want to stay unmarked.

The tail is for prying, not belting. The supplier describes it as a chisel and pry tail. No impact rating is stated anywhere, so use it as a pry bar and a scraper rather than something to hit with a hammer.

No standard is marked on it. No standard number is printed on the tools or the packaging in any supplier photograph, and no test certificate was sighted. If your workplace needs a tool certified to a particular standard, this is not that tool.

It is not insulated. Nothing here is rated or marked for live electrical work, whatever the general-purpose descriptions elsewhere on the internet say. Do not use it on anything that has not been isolated.

Q & A

What size nuts will it actually fit?

It depends which option you pick, and this is the thing to get right. Single Sided Teeth and Double Sided Teeth are both 6–22 mm on the small wrench and 22–32 mm on the large one. Pointed End is bigger: 14–30 mm on the small wrench and 30–63 mm on the large one, stamped into the handles. Measure across the flats of the fastener you care about and pick from there.

Will it undo a rusted-on nut?

Probably not, and it is the wrong tool to try it with. A self-adjusting jaw holds on fewer faces than a ring spanner, so a fastener that needs real force is exactly where it will slip and round off. Soak it, heat it, and use a six-point socket or ring spanner. Keep this for the fasteners that are only awkward, not stuck.

Is it chrome vanadium or carbon steel?

It depends on the option, and the supplier's own artwork says two different things. The panels for the single and three sided toothed sets say chrome vanadium steel forging, hardness up to 50 HRC. The panel for the pointed tail set says high-carbon steel forging, and an Australian retailer selling the same DL1421KB set also lists it as high carbon steel at up to 50 HRC. Both are the supplier's stated figures. Neither has been independently tested and we have not sighted a material certificate.

How many wrenches do I get?

Two, whichever option you choose. Every option on this page is a matched pair — one smaller wrench and one larger one — not a single tool and not a boxed set of many.

What is the difference between the tooth options?

Single Sided Teeth has the serrations on one gripping face; the other option has them on more than one face, which the supplier's artwork labels three-sided while the option here is named Double Sided Teeth. Both are listed at the same 6–22 mm and 22–32 mm ranges and both carry the same DL1423KB marking. More toothed faces means more bite on round pipe. If you are mostly on hex nuts, either will do.

Will it work on imperial fasteners?

Yes. Because the jaw closes onto whatever is inside its band rather than indexing to a named size, it does not care whether a fastener is metric or imperial. All that matters is that the across-flats measurement falls inside the range for the wrench you are holding.

How long does delivery take?

Allow 10–14 days from the day you order, and up to three weeks to be safe. Regional and remote addresses take longer again. Delivery is free to Australia and New Zealand.

Specs