34411 - utility knife with metal rail ARGENTAX TAP-O-MATIC No. 331 - MARTOR knife with metal rail. It is a very stable cutting tool equipped with an 18 mm wide blade. You can adjust the blade extension to 17 different levels using the blade lock. Measurements (L x W x H): 153 x 20 x 37 mm. Weight: 67 g. Cutting depth: 16 mm. Basic material: Plastic.