Made from a special steel alloy, they have a unique property called "Shaped Memory". This causes the wedge to react in 4 stages:- (a) Insert the wedge inot the wood. (b) The wedge then spreads its wings. (c) This "Shape Memory" characterisitic then attempts to return the wedge back to its originl position. (d) This pulld the two mitred pieces back together again, resulting in a perfect, tight join. All wedges (besides 5mm) have a horizental groove in the middle, which helps join harder surfaces easily. A cartridge system means no wedges are wasted. Each colour has a different colour cartridge, so they can easily be recognised. No adaptor is needed for the underpinner as the cartridges are the same dimensions. Each cartridge contains 275 wedges. Available in 2 box sizes.
