Gundlach 680-QT 1/4″ x 1/4″ x 3/8″ Versablade Trowel Blade – Square Notch

The handles (sold separately), 681-TH, 682-TH, 683-TH and 684-TH securely fasten to the blade by simply aligning the slotted openings of the handle with the steel button projections of the blade and tapping the trowel edge on the floor until tight and the front button is covered. To remove blade, simply tap trowel on opposite end.