high quality. Made of tremendous materials, durable. Used to modify electric motorcycle hub motor nuts, veritably for 500W-5000W motors with 12 shaft. Product parameters: Style:M12 front Colour:Silver+black Material:Metal Package Contents: 1 set * E-bike Hub Motor Axle Only the above kit content, other item usually are not included. Note: Light and sundry exhibits may cause the color of the thing in the photograph a little diversified from the real thing. The length allowed error is +/- 1-3cm.