rigid and resistant to bending as current poles therefore a weight and cost saving may be realized in brush poles through the use of the invention to prevent the head 27 of screws 26 fig3 from scratching the pool walls the clamping members 24 and 25 fig3 8 10 have a molded in projection 28 that extends above the screw heads 27 the v shapes 29 in clamp members 23 and 24 combined with their angled pole contact surfaces can securely clamp to poles of different diameters without damage these clamp members cooperate with similarly angled surfaces 22 of opposing v notches 20 and 21 in attaching base 17 forces on the brush are thereby applied at two locations on the pole as well as along the head 12 of brush 4 and the forces on blade 14 are applied throughout its connection with attaching base 17 the reinforcing ribs 18 and along the edge 13 that contacts the brush 4 in certain brush structures a pole engaging sleeve portion of the brush may extend from the brush head 12 one or both clamping members 23 and 24 may engage the sleeve portion of the brush instead of the pole itself the fixed angle 2 between blade 14 and pole 3 of thirty five degrees has been found to be satisfactory in operation with certain brushes although angles between twenty five and forty five degrees may be useful in certain applications the hydrofoil 14 with reinforcing ribs 18 and attaching base 17 may be molded in one piece of light weight metal or a thermoplastic such as polyvinyl chloride high.