Ultra SlimXikar's Xi series of cutters are world renowned. So when we proudly introduce a cutter without the iconic 'teardrop' shape, you can rest assured the Ultra Slim has passed our strict tests for sharpness, quality & style. At 60 ring gauge and as thin as a few credit cards, (only 3. 5mm thin!) the Ultra will fit any occasion. As useful as any Xi cutter, you'll never forget it rests your pocket or wallet. Model 107BK 107GM 107SL;