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Excelsior TurnMaster Square Cutter – Titanium Nitride Coated (TIN) (RSTM-GT3)

Robert Sorby Ltd

Price not listed

Designed for generating square sections such as shoulders or tenons where a turned part is to be assembled into a hole – a chair leg is good example. This cutter is also useful on the outside of a round form, as well as long straight sections on spindle work. Excellent results can be achieved in shear scraping mode with cutter especially effective shear scraping on the outside of a bowl. Manufactured with Robert Sorby high speed steel and coated with durable titanium nitride coating ensures this cutter delivers outstanding material reliability. Sharpening: Use a diamond file or honing stone ar

Robert Sorby Ltd's own words, read from their page.

Buy from Robert Sorby LtdPrice seen 2026-09-04. Affiliate link.

Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.

UK company
Registered at Companies House as ROBERT SORBY LIMITED, number 03464018. Checked 2026-08-29.
Means the business is a British legal entity, not a British-sounding name owned elsewhere. It says nothing about where anything is made.
UK operations
Not yet checked.
Means people employed here, or premises they actually work from. We keep this separate from the company badge because a registered office can be an accountant's spare room, and a company can be registered in Britain while everything it does happens somewhere else. Where we have not looked, we say so rather than assuming.
British-owned
No majority shareholding traced outside the UK. Companies House.
Read from the register of people with significant control, following the chain of holding companies. It does not gate anything: a firm can be made here and owned elsewhere, and that is worth telling you rather than hiding.
Where it is made
The maker doesn't say, so neither do we.
This is about the individual product, not the company. A British firm can sell things made abroad, which is normal and not a criticism. We would rather tell you which is which than average them into a score.