eps = 0.01;
infty = 300;

wall = 2;
bag_d = 50;
angle = 150;
body_h = 15;
bag_dist = 1.2*bag_d;
bags = 3;
body_l = (bags-1)*bag_dist;
screw_hole = 4;

module hook() {
	difference() {
		cylinder(r = bag_d/2 + wall, h = body_h, $fn = 128);
		translate([0, 0, -eps]) {

			cylinder(r = bag_d/2, h = body_h + 2*eps, $fn = 128);
			translate([0, -bag_d, 0])
				cube([bag_d, 2*bag_d, body_h + 2*eps]);
			rotate([0, 0, 90+angle])
				cube([bag_d, bag_d, body_h + 2*eps]);
		}
	}

	rotate([0, 0, 90+angle])
	translate([bag_d/2+wall, 0, 0])
		cylinder(r = wall, h = body_h, $fn = 32);
}

difference() {
	union() {
		translate([0, bag_d/2, 0])
			cube([body_l, wall, body_h]);

		for (i = [0:bags-1])
			translate([bag_dist*i, 0, 0])
				hook();
	}

	for (x = [0, body_l-bag_d/2 - 2*wall])
		translate([x, 0, body_h/2])
		rotate([-90, 0, 0])
			cylinder(r = screw_hole/2, h = bag_d, $fn = 6);
}