Handle Adapter, Male Thread, 1-3/4 x 8-1/2Mfr #: 15538 A must have tool to extend the reach of your various Concrete tools The MARSHALLTOWN Threaded Handle Adapter modifies the push button bracket on your concrete trowels, walking edgers, groovers, brooms or other tools to accept threaded handles. This Threaded Handle Adapter is a 1 3 4 Inch Push Button adapter with a threaded male end. Quickly and Easily Converts to a Push Button Handle. Use with Tools such as Bull Floats and Concrete Brooms.