Features: Roller Design: can slide freely on the grinding wheel, grinding wheel more comfortable and labor-saving. Function: change the tip length before clamping and change the grinding angle to meet the actual difference of the standard. Adjustable collet width: the collet width is adjustable, the collet width range 1 is 36-83mm, and the clamp 2 width range is 4-48mm. Dimension: 93mm in total lth, 40mm in width, compact structure and small size, easy to carry. Note: This product does not include the grinding wheel, just for showing in the picture. Sharpening guide only. Features: Material: cast iron. Color: silver+ Dimensions: approximately 93 x 40 mm (L x W). Package content: 1 sharpening guide Material: the body of the sharpener is made of cast iron durable, not easy to use, durable and long lasting. The stainless steel sharpening guide is painted with a black anti-rust finish for longer life and a sleeker look. Design: All standard sharpening angles can be achieved using this sharpening jig by adjusting the projection of the tool. Our sharpening tool features a hardened steel wheel that will not wear out over time or develop flat spots. How to Use: Move Guide Up/ down to increase/decrease angle, roller bearing, ball bearing, unrestricted back and forth movement when sharpening, simple to operate. Widely Used: suitable for wood chisels, planers, sprues, plane irons, beveled flat edges