include rad=12; h=3.5; w=1.2; looprad=3; loopw=w; rotate([0,0,-45]) { translate([0,rad,0]) { ClipHook(h=h,w=w,k=1.5, ye=-1.3); rotate([0,0,180]) ClipHook(h=h,w=w,k=1.5, ye=0.8); } } linear_extrude(height=h) { assign($fn=80) { FlatArc(0,0, rad-w/2,rad+w/2, 65,379); } assign($fn=30) { FlatArc(0,rad+looprad, looprad-loopw/2,looprad+loopw/2, 0,361); } }