This magnet has 30/60° edge as well as the standard 45° and right angle (90°) edge. The Centre hole makes it easier to handle. There are two small riveted holes for linking magnets together to add extra strength to the job. SPECIFICATION: Angles:30°/60°, 45°, 90° Dimensions:140 x 110 x 19mm Pull:36Kg Weight:0.5Kg