Hand tool and knife for deburring

A hand tool for deburring comprising:

• (a) a housing designed to be hand-held;
• (b) a cutting blade comprising a cutting head, a shaft, and at least one notch positioned at a rear end of the shaft;
• and
• (c) a rotatable holding device comprising a chamber for releasably holding the shaft of said cutting blade, the chamber comprising a protrusion, a spring, a slot, and a ball, wherein the protrusion engages the at least one notch of the shaft, a first end of the spring is held in a slit provided in the chamber and a second end of the spring presses against the shaft and holds the cutting blade in position, and the ball moves in the slot whereby, in a locked position, the ball is held in a recess of the holding device by the cutting blade,
• wherein the holding device is positioned within the housing, wherein the holding device is rotatable around a longitudinal axis of the housing and is able to freely rotate relative to the housing, and wherein the chamber runs obliquely to the axis of rotation (z) of the holding device whereby the cutting blade is held at an oblique axis within the holding device.