Two rollers design - Combine the two rollers with the bevel of your tool and you've defined a flat plane. Precision-machined shouders in the jaws hold your tool perpendicular to the axles and parallel to the wheel surfaces. This design virtually ensures a square edge on your tool if your sharpening stone is flat. Easily change - Just spin the clamping screw out, slide the slave jaw off the guide posts and you have wide open access to the wheel mounting screwvs. While you're putting it back togeter, you'll notice the deep, square cut Acme thread. lt spins down fast and grips the tool tight. Sharpening Angle Fixture for different angle - This handy set-up tool gives you a precise refrence fo primary bevel angles from 15 to 45 in 5 increments and a 2 micro-bevel off for every one of those primary bevels. Each angle has a postive pin registration, making repeat sharpening quick and easy. Please note that the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:red Material:Aluminum alloy Package Contents: 1 x Chisel Sharpening Kit 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.