A Clamping set for the aluminium profile to mount the alu-profile between the left and right side. Therefore the angle between the floor and the sides must be 90°, and the corners may have no obstacles. They are used mainly in Mobilhomes (=Campers). Drilling is not necessary, so there is no damage.Easy to install and uninstall. IMPORTANT : Length alu-profile (art. MP-100X16) = width between the left and right side minus 3 cm.Ex. : If the width between the sides is 98 cm, Then you have to order a 95 cm alu-profile (art. MP-100X16). Attention: Be sure the sides are strong enough so you don’t destroy them by clamping.