Abstract: The invention relates to a knife, comprising a blade holder and a blade having a blade plane, wherein the blade is arranged in such a way that the blade is retained in the blade holder at two points spaced apart from each other, i.e., a first point and a second point. In order to compensate hardening distortion that occurs when the blade is hardened, according to the invention the blade is retained in a non-displaceable manner at the first point and displaceably in a displacement direction at the second point with respect to the blade plane, wherein the shortest distance of the displacement direction going through the second point from the first point is greater than zero.

Abstract: A blade holder for smoothing and planing off a substrate comprising a handle, a receiving means including a receiving space for a blade, wherein the blade has a larger blade side surface and a narrow side which is at the rear in a cutting direction and which has a cutting edge, and a positioning aid for positioning the blade holder relative to the substrate, wherein the positioning aid includes a spacer device, by means of which the blade can be arranged in a spaced position in the receiving means in such a way that it can be positioned in spaced relationship with the substrate with its cutting edge for processing the substrate. A method and a blade for the blade holder are also provided.

Abstract: The invention concerns a blade holder for smoothing and planing off a substrate comprising a handle, a receiving means including a receiving space for a blade, wherein the blade has a larger blade side surface and a narrow side which is at the rear in a cutting direction and which has a cutting edge, and a positioning aid for positioning the blade holder relative to the substrate, wherein the positioning aid includes a spacer device, by means of which the blade can be arranged in a spaced position in the receiving means in such a way that it can be positioned in spaced relationship with the substrate with its cutting edge for processing the substrate. The invention further concerns a method and a blade for the blade holder.

Abstract: The invention concerns a bladed scraper having a blade head which includes a blade receiving means for a blade (K) for cutting an item to be cut in a cutting direction (s), wherein the blade receiving means has a working side from which the blade projects out of the blade receiving means in a working position with a working cutting edge (S) which comes into use. To make working with the bladed scraper safer it is proposed that the bladed scraper has a guide for limiting a cutting movement or cutting region (B) of the bladed scraper and/or for positioning the blade head at an attack angle (?) or in an attack angle range and that the guide is connected to the bladed scraper.

Abstract: A callous plane 1 having a blade head 2 and a handle 3 is disclosed, where callous plane 1 has an underside facing the body surface of a user when in working position, and an upper side facing away from said underside, and where a holding device 4 with a lower holding part 7 and an upper holding part 9 is provided in the blade head 2, in which a blade 5 can be held in such a manner that its cutting edge 6 intended for use to shave off callous skin is located on the underside of callous plane 1. To provide a callous plane 1 that is safer and easier to handle, and less complex to manufacture, it is proposed that lower holding part 7 be connected to handle 3 and display an upward-pointing seat 8 for blade 5, and that upper holding part 9 hold blade 5 tightly in seat 8 with the help of a fixing device.