The Magic (AKA Holding) Arm isn't really magic at all, but a jointed arm that locks with a snap and can hold even a large SLR. It's paired with a Super Clamp. Today I much prefer the Friction Arm over this one. This Magic Arm's magic has broken on me twice and is awkward and hard to use with its very firm locked/unlocked positions, which often require a harrowing amount of force to tighten and untighten, and in my case often gives off some nasty grinding sounds.