Amar Instruments ,Ophthalmic Crescent Blades (Round Wire) for Groove or Pocket or Tunnel Incision. These blades designed for making scleral tunnel (Pocket or Groove). These blades are available in 2.0 mm and 2.5 mm. These are used for Groove or Tunnel incision. Specifications: Single Bevel: Product No. Description 932001 2.0 mm Straight 20 Gauge 932051 2.0 mm Angled at 45 Deg.Bevel Up 20 Gauge 932052 2.0 mm Angled at 45 Deg.Bevel Down 20 Gauge 932501 2.5 mm Straight 20 Gauge 932551 2.5 mm Angled at 45 Deg.Bevel Up 20 Gauge 932552 2.5 mm Angled at 45 Deg.Bevel Down 20 Gauge Double Bevel: Product No. Description 932508 2.5 mm Straight Double Bevel 19 Gauge 932558 2.5 mm Angled at 45 Deg.Bevel Up 19 Gauge