A retaining device for a flexible line, comprising: a first member having a first retaining portion positioned on a first retaining surface of the first member; a second member having a second retaining portion positioned on a second retaining surface of the second member, the second member being moveably attachable to the first member; and a guiding means (110, 210) positioned on both of the first member and the second member; each guiding means (110, 210) includes a first convex surface (112, 212) configured to provide a first contact point for the flexible line, a second convex surface (114, 214) configured to provide a second contact point for the flexible line and a concave surface (118, 218) configured to curve the flexible line away from the respective retaining surface (100a, 200a) of the member (100, 200);wherein the first retaining portion and the second retaining portion are each configured to retain a flexible line; wherein in a convex configuration, the first member is in a first position relative to the second member such that a convex junction is formed between the first retaining surface and the second retaining surface, and the guiding means (110, 210) is configured to determine the curvature of the flexible line to be convex whereby, when the flexible line is retained, the first retaining surface and second retaining surface are radially inward of the curvature of the flexible line; wherein in a concave configuration, the first member is in a second position relative to the second member such that a concave junction is formed between the first retaining surface and the second retaining surface, and the guiding means (110, 210) is configured to determine the curvature of the flexible line to be concave whereby, when the flexible line is retained, the first retaining surface and second retaining surface are radially outward of the curvature of the flexible line; and wherein the guiding means (110, 210) is configured to determine the curvature of the flexible line to inhibit kinking of the flexible line when retained by the first retaining portion and the second retaining portion. a first member having a first retaining portion positioned on a first retaining surface of the first member; a second member having a second retaining portion positioned on a second retaining surface of the second member, the second member being moveably attachable to the first member; and a guiding means (110, 210) positioned on both of the first member and the second member; each guiding means (110, 210) includes a first convex surface (112, 212) configured to provide a first contact point for the flexible line, a second convex surface (114, 214) configured to provide a second contact point for the flexible line and a concave surface (118, 218) configured to curve the flexible line away from the respective retaining surface (100a, 200a) of the member (100, 200);wherein the first retaining portion and the second retaining portion are each configured to retain a flexible line; wherein in a convex configuration, the first member is in a first position relative to the second member such that a convex junction is formed between the first retaining surface and the second retaining surface, and the guiding means (110, 210) is configured to determine the curvature of the flexible line to be convex whereby, when the flexible line is retained, the first retaining surface and second retaining surface are radially inward of the curvature of the flexible line; wherein in a concave configuration, the first member is in a second position relative to the second member such that a concave junction is formed between the first retaining surface and the second retaining surface, and the guiding means (110, 210) is configured to determine the curvature of the flexible line to be concave whereby, when the flexible line is retained, the first retaining surface and second retaining surface are radially outward of the curvature of the flexible line; and wherein the guiding means (110, 210) is configured to determine the curvature of the flexible line to inhibit kinking of the flexible line when retained by the first retaining portion and the second retaining portion.