Rivet Gun Adaptor 1/4 Krausmann AC10100 The rivet gun adapter KRAUSMANN® has ergonomic design for comfortable and fast use. Suitable for aluminum rivets of thickness 2.4, 3.2, 4.0, 4.8 mm and inox 2.4, 3.2, 4.0 mm. ABS plastic reinforced shell. Forged aluminum steel tips. High durability ¼” socket adapter.