Blackdecker workmate dual height workbenches blackdecker wm550 the wm550 workmate from blackdecker has two working heights and a fixed position vice jaw which can be opened to a maximum of 226mm it will stand a maximum load of 250kg has a working top made from particle board and is supplied with adjustable pegs which enable it to hold irregular shaped objects folds flat for compact storage and transport blackdecker wm550 workmate dual height workbench