1[Three Main Bevel Angles] This honing guide features three main bevel angle settings, you can rotate top nut to quickly adjust to the desired bevel angle. 2[Adjustable Clamping] By rotating the hand turned screw, you can adjust the distance between the upper and lower clamping bars to securely hold chisels. 3[Fine Tuning] You can fine tune to the ideal angle using the eccentric roller for precise sharpening results, ensuring accurate cutting edges. 4[Convenient Scale Markings] The scale markings on the main honing guide assist in centering and adjusting the chisel blade for consistent and accurate sharpening. 5[Stable Base] The widened roller provides a stable base for the guide, preventing wobbling during sharpening and ensuring a stable and controlled sharpening process.