<p>A strap wrench for turning an object comprises a drive unit (12) and a strap (14) having a portion (14e) secured to the drive unit and a free end (14f). The drive unit comprises a rotary drive means (18) and a guide surface (48), the rotary drive means comprising a drive member connection formation (24) connectable with a rotatable input drive member and drive applying formations (22) for applying a drive to said strap. A passage (46) is defined between the guide surface and rotary drive means through which said free end 14(e) is threaded to form a loop with some of the drive applying formations (22) engaging the strap such that rotation of the rotary drive means pulls the strap through the passage to tighten the loop onto a generally cylindrical surface of the object to apply a turning force by which turning force the object is turned.
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