angular extent of the ribs 70 generally decreases as the position of the ribs from the front of the overmold increases the ribs 70 provide a very efficient gripping surface for the user of the hobby knife the overmold composition itself functions to provide a very tactile and soft feel for the knife the surface configurations 60 and ribs 70 facilitate gripping and manipulation of the hobby knife it should also be appreciated that the three overmold configurations 60 each provide a stable surface to prevent the hobby knife from rolling across a surface the blade holder 30 includes a frontal bulbous nose 32 which is bifurcated to form a slot 34 between two clamp fingers the holder includes a rearwardly extending shaft 36 the shaft 36 has a relatively small diameter to accommodate the overmold 50 the end of the shaft terminates with a threaded surface 38 which threads with the thread 28 in the threaded bore of the rear section the holder portion includes a conical taper 44 adjacent the nose 32 the shaft is receivable in the tube of the front section so that the nose 32 extends generally forwardly from the front surface the extension is received in the cavity and the shaft thread 38 engages thread 28 to connect the sections 22 24 together a washer 48 may be preferably positioned between the intermediate ends of the front and rear sections to facilitate the tightening of the threaded.