shows mat 100 on the tailgate of pick up truck 908 having the upawrdly curved faces 602 r 602 l of a pair of chocks 600 r 600 l positioned to secure the tires of a recreational vehicle 912 in the bed of the truck the recreational vehicle may either be pushed firmly against the cab of the truck or else another pair of oppositely facing chocks my secure the opposite pair of its tires fig1 shows two pairs of chocks 600 r 600 l securing a barbecue grill 914 and a propane tank 916 to mat 200 leaving room on the mat for the user to stand while cooking the vertically curved faces 604 r 604 l of one pair of the chocks secure the cylindrical propane tank while the upwardly curved faces 602 r 602 l of the other pair secure the wheels of the grill it should be appreciated that this arrangement not only secures these hazardous articles independently to prevent dangerous individual movement but also secures them together to prevent dangerous movement relative to each other fig1 shows a tractor 918 secured to or located on mat 200 by the upwardly curved faces 602 r 602 l of chocks 600 r 600 l interfacing with the tractor 39 s front tires to prevent forward rolling an additional pair of chocks could be similarly used to secure the rear tires to prevent rearward rolling and fig1 shows a bait bucket 922 and a cooler 924 being similarly secured by this mat chock system in a boat 920 while the invention has been shown and described with reference to specific exemplary.