Choosing razor blades and shaving heads without making an expensive mistake

A blunt razor blade, the wrong replacement blade or a shaving head that does not fit your device: these are common reasons for paying twice. When choosing razor blades and shaving heads, it is not just the number of blades or a well-known brand name that matters. Compatibility, replacement intervals and how you intend to use the product all determine whether your purchase is genuinely practical.

Pay particular attention to these three pitfalls:

• The wrong connection: a cartridge may look as though it fits, but still be incompatible with your handle or shaver.
• Marketing claims without context: terms such as “long-lasting smoothness” or “less irritation” mean little without information about how often you shave, your skin type and your shaving technique.
• A multipack that is not actually better value: a pack containing lots of replacement razor blades is only worthwhile if you use them within the recommended period and they are suitable for your system.

Check the system and model number first

The key difference between manual and electric shaving systems is how you replace the shaving component:

1. Manual razor blades and refill cartridges
   These click onto an existing handle. According to the product information, Gillette Fusion5 blades fit Gillette ProShield, ProGlide and Fusion5 systems. According to the product description, Venus refill blades are suitable for Venus systems, with exceptions such as Simply Venus and Venus for skin and intimate areas. Always check these exceptions before buying.

2. Shaving heads for electric shavers
   Find the full model number on the back of the device, in the manual or on the old shaving head. Philips shaving heads such as SH50/50 and SH91/50 are not interchangeable: SH50/50 is designed for Philips 5000 Series, while SH91/50 fits the Philips 9000 Series and S9000 Prestige according to the product specifications.

3. Trimmer and body groomer parts
   A trimmer head or shaving foil is often specific to one series. The Xiaomi UniBlade replacement head, for example, is designed for the Xiaomi UniBlade trimmer. According to the product information, the Philips BG2010/43 is designed for Bodygroom Series 3000, 5000 and 7000.

Practical check: compare the brand, series and model number. Searching only for “Philips shaving heads” or “Braun shaving heads” is not enough.

These specifications determine the cost of use

Number of blades and features

More blades do not automatically mean a more comfortable result. A five-blade cartridge can be efficient, but it also requires the right shaving angle and thorough rinsing. Also consider the features that are relevant to you:

• a lubrication strip for smoother gliding;
• microfins or a microcomb to guide hairs towards the blades;
• a precision trimmer for sideburns or the area beneath the nose, for example;
• a protective cap or comb attachment for sensitive areas of the body.

According to the product descriptions, Fusion5 and ProGlide blades have five blades and a precision trimmer. Venus offers versions with three or five blades, depending on the model.

Replacement interval

The lifespan depends on how often you shave, hair thickness, maintenance and storage. Manufacturer information is therefore a guideline, not a guarantee for every user. Gillette states that Fusion5 blades can provide up to 20 shaves per blade, based on three shaves per week. Up to 15 shaves are quoted for Mach3. Philips recommends replacing SH50/50 after around twelve months, while SH91/50 can be replaced after around two years according to the product information.

Replace the blade sooner when:

• it pulls or provides a less even shave;
• the lubrication strip is visibly worn;
• the shaving head becomes damaged;
• you need to apply more pressure to achieve the same result.

Materials, maintenance and skin comfort

Stainless-steel cutting surfaces, a well-fitting housing and an intact lubrication strip are product properties that you can check. If you have sensitive skin, using less pressure, a clean blade and a suitable shaving product can be just as important as the number of blades. Claims about skin comfort or irritation should be understood as brand information. According to Gillette’s own information, certain Venus Deluxe Smooth Sensitive cartridges have been dermatologically tested; this does not mean that every user will have the same experience.

Rinse manual cartridges thoroughly and allow them to dry. Only place electric shavers under water if the model is designed for this. Switch off the device and follow the manual when replacing a shaving head.

Recommended choices for different user profiles

Suitable for: Budget-conscious beginners

Gillette Fusion 5 Razor Blades 16 Pieces

Why it suits this profile: A pack of 16 cartridges is practical for anyone who shaves regularly and does not want to keep ordering small refill packs.

How this product avoids the pitfall

The stated compatibility with ProShield, ProGlide and Fusion5 makes it easier to check your handle than with a general-purpose refill cartridge.

Key benefit & advantages

5 blades, lubrication strip, microcomb and precision trimmer; up to 20 shaves per cartridge according to Gillette.

Suitable for: Shoppers looking for premium quality

SH91 Replacement Shaving Heads SH91/50

Why it suits this profile: For users of a Philips 9000 Series or S9000 Prestige looking for an original replacement designed for their model.

How this product avoids the pitfall

The SH91/50 model and compatibility with S9xxx and SP98xx are clearly stated. This reduces the risk of choosing the wrong shaving head.

Key benefit & advantages

3 shaving heads, click-on installation and up to 150,000 cutting movements per minute according to Philips.

Suitable for: Specific uses & intensive users

Philips QP624/50 OneBlade Shaver Replacement Blade

Why it suits this profile: Suitable for users who trim, shave and groom body hair with a single OneBlade system.

How this product avoids the pitfall

The product information states compatibility with all Philips OneBlade trimmers. Use the protective cap on sensitive areas, and not on irritated or damaged skin.

Key benefit & advantages

2 replacement blades, 360-blade technology, protective cap and a 3 mm body comb.

Suitable for: Users with sensitive skin

Gillette Venus Deluxe Smooth Sensitive Refill Cartridges

Why it suits this profile: These refill cartridges are designed for Venus users looking for a version with a lubrication strip and five blades.

How this product avoids the pitfall

Compatibility is specified for Venus systems, with exceptions. So check your handle before ordering instead of relying solely on the variant name.

Key benefit & advantages

3 cartridges per pack, five blades and a SkinElixir lubrication strip according to the product details.

Frequently asked questions about razor blades and shaving heads

How do I know which shaving head fits my electric shaver?

Make a note of your device’s full model number and compare it with the replacement shaving head’s compatibility list. Philips SH50/50, SH91/50 and Braun 52S, for example, are designed for different series. Do not buy based on the brand alone.

How often should I replace razor blades?

That depends on how often you shave and how you maintain the blade. Manufacturer guidelines provide an indication: Fusion5 is stated to provide up to 20 shaves, while Philips gives an interval of twelve months to two years for some electric shaving heads. Replace sooner if the blade pulls, shows rust or damage, or has a worn lubrication strip.

Are refill blades cheaper than buying a new shaving system?

Refill blades are often better value when your handle or electric device is still working properly. Compare the price per cartridge or shaving head and check the expected lifespan. A large pack is not automatically better value if the blades do not fit your system or are left unused.