Crimping pliers set buying guide
Updated: 21 October 2026
You opened amazon.co.uk looking for a crimping pliers set and every box showed a ratchet plus coloured metal. That is not one purchase. On the listings we kept, shelf prices ran from £19.54 to £42.99, and the jaws split between bootlace ferrules, insulated terminals, one six-head frame, and one RJ45 kit. This buying guide is the order of decisions before you open the [crimping pliers set comparison](/hub/pliers/crimping-pliers-set). A qualifying purchase can earn us a commission at no extra cost to you. Match the die to the terminal first. The piece count on the lid comes last.
You opened amazon.co.uk looking for a crimping pliers set and every box showed a ratchet plus coloured metal. That is not one purchase.
You opened amazon.co.uk looking for a crimping pliers set and every box showed a ratchet plus coloured metal. That is not one purchase. On the listings we kept, shelf prices ran from £19.54 to £42.99, and the jaws split between bootlace ferrules, insulated terminals, one six-head frame, and one RJ45 kit. This buying guide is the order of decisions before you open the crimping pliers set comparison. A qualifying purchase can earn us a commission at no extra cost to you. Match the die to the terminal first. The piece count on the lid comes last.
Our top picks
| Badge | Product | Die family | Printed range | In the box | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Preciva Preciva ferrule crimper set, 1,200 sleeves | Ferrule | 0.25–10 mm² | 1,200 sleeves | 9.4 | about £22.99 | View offer |
| Alternative |  Preciva Preciva insulated terminal kit, 370 pieces | Insulated terminals | 0.5–6 mm² | 370 rings and spades | 9.2 | about £22.99 | View offer |
| Best value |  Hibisaws Hibisaws ferrule kit, 1,250 sleeves | Ferrule | 0.25–10 mm² | 1,250 sleeves | 9.0 | about £19.99 | View offer |
On this page
Four kits that are not interchangeable
A ferrule kit closes a metal tube around fine strands. The Preciva CP621200, the Hibisaws HSC8 6-4, the Preciva twin-sleeve kit and the AivaToba tool to 16 mm² are that family. Buy one for a cord-end sleeve in a screw terminal, not because the lid says 1,200 pieces. RS’s crimp-tools guide treats an insulated terminal as a different family.
An insulated kit has three colour nests: red 0.5–1.5 mm², blue 1.5–2.5 mm² and yellow 4–6 mm², with overlap by brand. The Preciva RC50371, the boxed RC60003 and the Grasomtools GR30J sit there.
Only the Preciva six-head set claims both, by swapping jaws, at £42.99, and a UK review says the heat-shrink splices would not grip. The Proster PST322 will not close a bootlace or a ring. If you hold both a sleeve and a red ring, the ferrule crimper or insulated terminal crimper page is that fork.
Range, ratchet and the terminals in the box
Domestic flex in a UK house is usually inside 0.25–10 mm², which is why four ferrule listings stop there. The AivaToba listing goes to 16 mm², useful only if you strip that size. Insulated kits here stop at 6 mm². BS 7609 starts at 10 mm² copper and is the wrong document for these boxes.
Prefer a ratchet that will not open until the cycle ends. A mid-stroke release leaves a crimp that slides off on the first tug. The stroke sits on the how to crimp a bootlace ferrule page. UK reviews still call yellow rings thin or a handle cover loose, and a higher piece count does not fix the jaw.
What to leave for a trade tool
A kit here is a ratchet plus a box for occasional DIY once the circuit is isolated, not a factory-set trade tool. When we checked, the C.K T3684 was £56.69 on amazon.co.uk and £108.49 including VAT at RS, and the Knipex 97 53 04 was £211.34 including VAT at RS. Those prices move, and they do not include sleeves.
If you crimp every working day, or you are signing the joint, a £20 kit is the wrong budget. If you replace a flex twice a year and can isolate the circuit, the kit price is the right band and the die still comes first. Who each kit is for sits on the best crimping tool kit page. Plastic handles are not live-working insulation, and a CE line is not a UKCA approval of the crimp.
What to check before you order
Ask what is in your hand. A bootlace sleeve is a ferrule row. A red, blue or yellow ring is an insulated row. An RJ45 plug is the Proster, and only that. Read the printed mm² on the collar or the barrel, not the plastic colour, because ferrule colour codes disagree with the three-colour ring code. Then check whether the listing includes terminals, a case, or a stripper.
If the answers line up with a ferrule kit in 0.25–10 mm², open that filter on the comparison. If they line up with insulated terminals, open the other. If you do both jobs, look at the six-head row and the heat-shrink complaint before you pay £42.99. The IET treats a properly crimped ferrule as one way to meet BS 7671 Regulation 526.9, not as a rule that every cable needs a sleeve.
Common questions
Do I need a ferrule kit or a red, blue and yellow kit?
If the next terminal is a bootlace sleeve for a screw terminal, buy a ferrule kit. If it is an insulated ring, spade, bullet or butt, buy a three-colour nest. Only the Preciva six-head listing claims both, by swapping jaws, and a review of its heat-shrink splices is a reason not to treat it as universal.
Is 0.25–10 mm² enough for household flex?
For most lighting and appliance flex in a UK house, yes. Four ferrule kits here stop at 10 mm². The AivaToba listing goes to 16 mm² if you actually strip that size. Insulated-terminal kits stop at 6 mm². BS 7609 starts at 10 mm² copper for uninsulated power connectors and is the wrong standard for these boxes.
Does a higher piece count mean a better tool?
No. Quality in this set shows up as a die that matches the terminal, a ratchet that finishes the cycle, and terminals that survive a tug. UK reviews still fault thin yellow rings and fragile boxes on kits with hundreds of pieces. Count the jaw first, then the metal, then the price.
Can one kit do both ferrules and ring terminals?
In this comparison, only the Preciva six-head set at £42.99 claims both, by changing heads. The square ferrule kits will not crimp a red ring correctly, and the three-colour nests will not close a bootlace tube. An RJ45 kit does neither job.
Should the box include a stripper?
Only if you want one in the same order. The Preciva DERC46002 lists a 0.2–6 mm² stripper and no terminals. Several other kits do not name a stripper at all. A missing stripper is not a failed crimper. You still need a way to expose the copper to the printed length.
When is a £20 kit the wrong budget?
When you crimp every working day, when the joint is in a board you will sign, or when you need a factory-set trade tool. C.K and Knipex bootlace ratchets were tool-only and several times this shelf price when we checked. For occasional isolated DIY, the die match still matters more than the extra pounds.
Is an RJ45 crimper the same purchase?
No. The Proster PST322 is a pass-through tool for Cat5e, Cat6 and Cat7 plugs, with 50 plugs and a tester. It will not crimp a ferrule or an insulated ring. If the job is a network plug, that is the row. If the job is a screw terminal, leave it on the shelf.
Related pages
Sources
Public UK sources from the research digest, last checked on 19 October 2026. Shelf prices and star lines are the amazon.co.uk figures in the display file.
- IET Wiring Matters: Mythbuster 5, terminal blocks and ferrules (retrieved 19 October 2026)
- IET EngX: Ferrule crimps (retrieved 19 October 2026)
- IET EngX: Crimping of flexible cord conductors (retrieved 19 October 2026)
- BSI: BS 7609:1992+A2:2009, uninsulated power connectors (retrieved 19 October 2026)
- HSE: Electricity at Work Regulations guidance, HSR25 (retrieved 19 October 2026)
- RS: Bootlace ferrules (retrieved 19 October 2026)
- RS: Knipex 97 53 04 crimp tool (retrieved 19 October 2026)
- Klauke GB: Insulated solderless terminals (retrieved 19 October 2026)