Front Sight Adjustment Tool 4-/5-Prong A1/A2 Front Sight Tool Optimal Length and Slimmer Ergonomic Design for Ease of Use Adjust Elevation of either 5-Prong A2 Front Sight or Post 5-Prong Rear A1 Sight Patterned Surface for Easy Grip One Piece Precision machined Steel Part Length: 35mm & 1.38 inch