I got a set of black mats, with the Land Rover logo and all, they fit well... but the are strange holes in them, like for fixing them to the floor of something. But there are no screws or anything... And those holes looks rather poorly cutted, like they were handmade...

Is it normal?

There is a special hook that should be fitted in the front footwells to stop the mats sliding, that's what the hole engages on.
This is the one that is fitted to my TDv8, and also the rubber mat with the hole



 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Weird because

1. I got no hook whatsoever

2. The holes in my mats are roughly there

You have the older type of mats. With the mats they usually provide the hooks that you have to install making a hole in the carpet. Usually they do not get installed because of the hole in the carpet and they break easily and you don't need them, the mats do not move around.
I case you want to install them I have a set, you can have them for free(well, a beer would be appreciated ), let me know '08 RRS TDV8
I converted my diesel RRS to run on an environmentally friendly mixture of caribou fat and baby seals oil

Thanks!

Never used the plastic clips with our carpet mats.

I just let them slide forward and jam under the brake pedal for that 'Adrenalin really is brown' moment at high speed! Runner up - 2009 Best Avatar Award
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06 RRS TDV6 HSE, Java/Ebony, PTI, Running Boards, Privacy, S/C Grille/Vents, Stormers, Tasmods - GONE - (

 
L 405 2013 FFRR 5.0 SC
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WINNER - 2009 �Best Avatar� Award
WINNER - 2009 Comedian Of The Year Award

Tim, you need to vacuum your carpets. Arctic Frost TDV6 SE. Aspen Leather, Cherry Wood, Privacy Glass, PTI, Tow Pack, Mudflaps, Tasmods, a new Fuelflap, a RRSport.co.uk umbrella in the boot & a RRSport.co.uk sticker on the rear glass.
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TB wrote:

Tim, you need to vacuum your carpets.

Carpets are now clean - the car was serviced last week and the interior valeted at the same time! Interior cleaning once a year is enough for my car, it hardly ever gets used................................ seriously I don't normally have a dirty interior, I think that picture was taken in Feb/March when the weather was not good enough to be taking the vacuum cleaner outside - I now have a battery powered vacuum for car cleaning! 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW