Correct, it is a set with 3 pcs.

As I understand it, these are only suitable for the 5000 and 6000 series. The brochures are usually very generic.

Hello I have an SW3700 which should use SH30 replacement shaving heads. However, SH50 shaving heads also work well on this device (tried it myself). I also have an S5250 on which SH30 shaving heads work well. In my opinion, SH50 should work.

Here is the supplier's answer: The SH50/50 (https://www.galaxus.ch/fr/s6/product/philips-series-5000-scherkopf-haarentfernung-zubehoer-5675196) is compatible with the S5000 "round" and "square" products. However, if you choose our other shaving head, the SH71/50 (Philips 7000 Series, 5000 (Razor Blade, Beard Trimmer Accessory),) it is only compatible with the S5000 "square" products. If you have any problems using the product, please contact our support team: https://www.philips.de/c-w/support-home/support-contact-form.html.

Hello Andreas, according to Philipps it is for all 5000 models incl. AquaTouch (S5xxx) ... https://www.philips.de/c-p/SH50_50/shaver-series-5000-scherkoepfe

According to the supplier, the appropriate spare part for the RQ1260 device is the SH71/50. Philips 7000, 5000 Series (Beard trimmer accessory, razor blade)

Yes...shear heads are replacement blades

This from the official Philips site: https://www.philips.co.uk/c-p/SH50_50/shaver-series-5000-shaving-heads "Fits product type Shaver Series 5000 (S5xxx) AquaTouch (S5xxx, AT8xx, AT7xx) PowerTouch (PT8xx, PT7xx) Shaver Series 6000 (S6xxx) HQ71xx, HQ72xx, HQ73xx, HQ77xx, HQ78xx, HQ88xx" so yes it should also fit the AT750

Normally yes :-))))))))))))