A profitable shortcut to hand troweling Hand troweling cementitious materials is time-consuming. Save time, speed up the process and increase your profits by using a ToughTek M680a Mortar Pump to spray and finish-trowel the material instead of using the traditional hawk and trowel method. The ToughTek M680a Mortar Pump is engineered to withstand the grittiest of materials, yet is easy to use and clean. Its high velocity flush is often all you need to clean the pump and prevent build-up in the lines. The ToughTek M680 Mortar Pump. Simply a better alternative to hand troweling.