Durable high impact, rigid polycarbonate construction for strength and accuracy. Provides superior holding power when assembling small pieces at right angles on small items and projects. Ideal for drawers and for precise, detailed work such as dolls houses and music boxes. Measures 102 x 102mm (4" x 4") x 32mm (1-1/4") square. Maximum throat depth 58.5mm (2-3/8"). Minimum throat depth 31.8mm (1-1/4")