-Lansky Tri-Stone Benchstone BS-TR100 is a universal hand-held sharpener, which has 3 versatile sharpening surfaces in the form of a diamond plate with a gradation of 120, an alumina stone with a gradation of 240 and ceramics with a gradation of 1000. Lansky Tri-Stone Benchstone BS-TR100 is a stationary sharpener that allows you to repair the blade as well as the full spectrum of knife sharpening. The sharpener consists of a polymer base with a non-slip rubber base and a removable module with three sharpening surfaces. The whetstone can be used for quick sharpening, rebuilding the cutting edge and sharpening the proper sharpening of blades with low, medium and higher hardening degree. Sharpening surfaces: 120 grit diamond plate is used to rebuild the damaged cutting edge and change the cut profile alumina oxide, grade 240, sharpening stone ceramic stone with a gradation of 1000, is dedicated to smoothing the cutting edge Sharpening "by hand" requires some practice, therefore the Lansky Tri-Stone Benchstone BS-TR100 sharpener is recommended rather for people who already have experience in this type of sharpening. TECHNICAL DATA Basic information What do you want to sharpen? steel knife, knife Types of gradation coarse 240, extra fine / 1000, coarse / 120 Blade type plain Sharpener type flat large diamond Sharpening type sharpening by hand Additional data Abrasive material ceramics (synthetic), Diamond , stone Dimensions Weight [g] 290 Width [mm] 51 Total height [mm] 152