For Bore Diameter: 1/4 To 1". For Shaft Diameter: 1/8 To 1". Includes: (5) Alloy Steel Color Coded Tips, (1) Hex Wrench. Tip Angle: 0, 90¡ã. Tip Size: 0.023, 0.036, 0.047 (Straight), 0.036, 0.047 (Bent)".