Portable hand chain grinder is made of stainless steel+alloy, which is durable. The is small, light and easy to carry. Easy to use outdoors. The chain grinder is easy to use. Just put the clamp on the rod, position the pawl on the tooth, insert the burr into the guide sleeve and turn the handle. In order to adapt to different types of chains with different holes, the is designed with two holes for fixed sharpening, one hole is fixed and the other hole moves back and forth, which is very flexible. Portable hand chain grinder is light in weight, easy to carry, convenient for outdoor use, and protects your hands from injury. Use portable hand-operated chain grinder to make your chain saw sharp as new, and make your work more time-saving and labor-saving. Name: portable hand chain grinder set Grinding head specification: 4mm/5mm/6mm. Colour:Grey Material:metal Package Contents: 1 x Chain grinder set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.