A load carrier foot for attaching a load carrier bar to a vehicle, said load carrier foot comprising a body with a support surface adapted to be positioned against a first surface of the vehicle, a clamping member adapted to clamp a second surface of said vehicle to enable a clamping force between said support surface and said clamping member, an attachment arrangement being operable to operate said clamping member and thereby vary said clamping force between said support surface and said clamping member, wherein said attachment arrangement comprises - an elongated adjusting member (40, 40'), which threadedly engages said body or a member arranged to said body at a first area of said elongated adjusting member (40, 40') and engages said clamping member at a second area of said elongated adjusting member, and by rotating said elongated adjusting member (40, 40') said clamping force is varied, said elongated adjusting member (40, 40') comprising a first engagement portion (43, 43') arranged at said second area, said first engagement portion (43, 43') being arranged at the periphery of said elongated adjusting member (40, 40'), and - a locking member comprising a second engagement portion (75, 75') matching said first engagement portion (43, 43') of said elongated adjusting member (40, 40'), wherein said second engagement portion (75, 75') of said locking member and said first engagement portion (43, 43') of said elongated adjusting member (40, 40') are adapted to mate in a locked position, wherein said adjusting member (40, 40') is prevented from rotating, and said second engagement portion (75, 75') of said locking member and said first engagement portion (43, 43') of said elongated adjusting member (40, 40') are adapted to be separated in an open position, wherein said elongated adjusting member (40, 40') is rotatable characterized in that said locking member is arranged at least partly around said second area of said adjusting member (40, 40') and its first engagement portion (43, 43') and in that said locking member comprises a locking portion comprising said second engagement portion, said locking portion being adapted to partly surround the circumference of the first engagement portion (43, 43') of the elongated adjusting member (40, 40'). - an elongated adjusting member (40, 40'), which threadedly engages said body or a member arranged to said body at a first area of said elongated adjusting member (40, 40') and engages said clamping member at a second area of said elongated adjusting member, and by rotating said elongated adjusting member (40, 40') said clamping force is varied, said elongated adjusting member (40, 40') comprising a first engagement portion (43, 43') arranged at said second area, said first engagement portion (43, 43') being arranged at the periphery of said elongated adjusting member (40, 40'), and - a locking member comprising a second engagement portion (75, 75') matching said first engagement portion (43, 43') of said elongated adjusting member (40, 40'), wherein said second engagement portion (75, 75') of said locking member and said first engagement portion (43, 43') of said elongated adjusting member (40, 40') are adapted to mate in a locked position, wherein said adjusting member (40, 40') is prevented from rotating, and