mid: 1111
url: http://www.dcs.ed.ac.uk/home/objects/vrml/hammer.wrl.gz
ref_url: http://www.dcs.ed.ac.uk/home/objects/vrml/?D=D
format: 
pid: 30941
polygons: 1038
connected_components: 2
average_dihedral_angle: 0.484594
bounding_box: xmin = 0.025, ymin = 0.025, zmin = 0.025, xmax = 0.455275, ymax = 0.975, zmax = 0.160898
avg_depth: 1.075113
center: (0.201736,0.613138,0.089180)
scale: 0.601535
principle_axes: (0.045665,0.998939,0.005992), (-0.998804,0.045762,-0.017204), (-0.017460,-0.005199,0.999834)
principle_values: (0.104649,0.006626,0.000906)