Abstract: A combination lock (100) comprising a body (10) formed with a plurality of parallel slots (20) and a bore (30) intersecting with the slots (20) to form co-axial apertures (32) through the parts of the body (10) immediately above and below each of the slots (20), each said aperture (32) above a respective slot (20) being formed with an unlocking groove (34). A plurality of dials (40) are received in the slots (20) respectively, each of which is formed around its inner side with a ring of equi-angular recesses (42). An inverted J-shaped shackle (60) having a longer limb (62) extends into the bore (30) and passes through the dials (40).