... side of cutterSteel quality: 45# carbon steel,950 N / mm,Density/hardness: 800 950 N / mm,Weight of blade: 490 - 500 g / piecesSteel thicknessr ... 2,3 mm after lacqueringone side sharpened to 0,7 ... edge I mmScrew opening at socket 4 mmSocket opening: 28 mm (+/- 0.5 mm tolerance)Hole for screwr diameter 4 ...