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Carbon steel vs stainless bonsai shears

Updated: 22 October 2026

You will either dry and oil a blade after pruning, or you will not, and that habit matters more than a shop line about which steel is sharper. Carbon steel vs stainless bonsai shears is one decision: what the metal asks you to do on a UK windowsill or in a damp shed. Shop pages often say carbon holds an edge and stainless does not rust. Both sentences overreach. Prices and review notes are from amazon.co.uk listings captured on 19 October 2026 for our [bonsai shears comparison](/hub/garden-tree-and-hedge-shears/bonsai-shears). Peter F. did not measure hardness in a lab. A qualifying purchase can earn a commission at no extra cost to you.

You will either dry and oil a blade after pruning, or you will not, and that habit matters more than a shop line about which steel is sharper.

Our top picks

Spear & Jackson Spear & Jackson 4453KEW

Best overall

Spear & Jackson Spear & Jackson 4453KEW
8.0/10about £7.95
View offer
Wazakura Wazakura satsuki shears

Alternative

Wazakura Wazakura satsuki shears
7.6/10about £39.99
View offer
Saboten Saboten SD-8

Best value

Saboten Saboten SD-8
6.6/10about £13.19
View offer
On this page
  1. 1.What each steel asks you to do
  2. 2.Carbon steel in this set
  3. 3.Stainless, and the rust report
  4. 4.When to pick which

What each steel asks you to do

Carbon steel, including S58C on the Wazakura shears, wants the sap wiped off, the blade dried, and a light oil on the steel and the pivot. Wazakura’s care sheet says that because carbon steel rusts. The RHS says the same for garden cutting tools: dry storage, oil at the pivot, and sap removed. If you will skip that, carbon is a poor buy. Stainless still needs a wipe. The RHS notes that modern stainless is less likely to rust, depending on the metal, and that occasional oiling may still be required. One UK reviewer reported rust after a few days on the vouiu kit sold as 3Cr13. That is a care warning, not a verdict on every Japanese scissor.

Carbon steel in this set

Four Wazakura shears are forged S58C, and all of them need the dry-and-oil habit. The butterfly is 180 mm, a 50 mm blade, 156 g, about £39.99. The twig shear is 89 g, 5.0 from only 10 reviews, and not for thick branches. The satsuki shear is 84 g, about £39.99, with a ceiling of about 4 mm. The ashinaga is 200 mm, 154 g, about £34.99, with a ceiling of about 6 mm and a handedness field that says Right. The Spear & Jackson 4453KEW is the other carbon scissor: 100 g, about £7.95, with no millimetre limit. It is a fair buy if you will oil it, and the wrong saving if it will live wet. One UK review says the ashinaga edge marked above about 0.5 mm. Ceilings are on how to choose bonsai shears.
Spear & Jackson Spear & Jackson 4453KEW

Testsieger

Spear & Jackson Spear & Jackson 4453KEW
8.0/10about £7.95
View offer

Stainless, and the rust report

The Saboten SD-8 is a 65 g stainless harvest shear at about £13.19, 4.6 from 142 reviews. UK reviews keep it on very thin early growth. The PT-16F is fluorine-coated, 42 g, about £21.59, 4.7 from 281 reviews, and limited to delicate stems. The coat is for sap release, not a rust warranty. One UK review reports a blade that snapped after about five months of light deadheading. The KSTE shear is 230 g, about £13.09, 4.3 from 13 reviews. One UK review says it arrived used. Under the Consumer Rights Act 2015, sections 9 to 11, that is a seller-condition point, not a steel test. The vouiu kit at about £63.30 says 3Cr13 and still drew a UK rust report. The wipe and oil steps are on how to use bonsai shears.

When to pick which

Choose carbon if you will dry and oil it: a Wazakura shape around £35 to £40, or the Spear & Jackson at about £7.95 with no printed cut limit. Choose stainless for a damp windowsill if you will still wipe the sap. That is the Saboten SD-8 at about £13.19, or the PT-16F if you have read the lock and breakage notes. No listing here prints a hardness figure, so carbon is not automatically sharper. Stainless is not rust-proof. A rust review on one ASIN does not condemn the brand, and a German rust note on one Wazakura pair is not a UK consensus.

Common questions

Does stainless mean the blade cannot rust?
No. Stainless resists rust better than bare carbon steel. It is not a promise. One UK review on the vouiu kit reported rust after a few days even though the listing says 3Cr13. The RHS also says occasional oiling may still be needed. Shop lines that say stainless tools do not rust are the claim to refuse.
Does carbon steel stay sharp longer?
Makers and some UK bonsai shops say carbon takes a fine edge. These amazon.co.uk listings do not print a hardness number, so this page does not rank the steels by sharpness. A UK review of a marked ashinaga edge above about 0.5 mm is about cutting too thick, not a softness score for S58C. Keep the bevel, and do not grind the flat.
What does a fluorine coat actually do?
On the Saboten PT-16F the fluorine coat is for sap release. It is not a rust warranty and not a licence to skip wiping. The shear is still limited to delicate stems. One UK review reports a blade that snapped after about five months of light deadheading, so the coat is not a durability claim either.
Is S58C a stainless grade?
No. On these Wazakura listings S58C is black carbon steel. The care sheet tells you to clean and oil it because carbon steel rusts. Do not read S58C as a stainless code because the scissors look dark. The stainless models in this set say stainless, 3Cr13, or fluorine-coated stainless in plain words.
Should you oil the pivot on a stainless snip?
Yes, lightly, after you have wiped the sap. The RHS says oil may still be required on stainless, depending on the metal. You do not need the same dry-and-oil routine as on S58C, and you should not store the snip wet or caked. One UK rust report on a 3Cr13 kit is a reason to doubt a never-rusts line. It does not score every Saboten or every Wazakura, and a German rust note on one Wazakura pair is not UK evidence.

Related pages

Bonsai shears for indoor plants

Best bonsai shears

Bonsai shears

How to choose bonsai shears by shape, cut, and steel

How to use bonsai shears: cut, clean, oil, and store

Sources

Public UK and maker sources used for this comparison. Listing prices, stars, and review counts are from amazon.co.uk on 19 October 2026.

  1. RHS — cleaning hand tools (retrieved 19.10.2026)
  2. RHS — sharpening hand tools (retrieved 19.10.2026)
  3. RHS — how to prune a tree (retrieved 19.10.2026)
  4. RHS — bleeding from pruning cuts (retrieved 19.10.2026)
  5. Consumer Rights Act 2015 (retrieved 19.10.2026)
  6. Wazakura — types of bonsai scissors (retrieved 19.10.2026)
  7. Bonsai Shop (UK) — bonsai tools (retrieved 19.10.2026)
  8. Suwada UK — essential bonsai tools (retrieved 19.10.2026)