with the projections 23 of the fixed member 13 and a pin 29 extends through the openings 28 and slots 24 to hinge bending member 16 to fixed member 13 the bending member 16 further includes a portion 30 that extends upwardly and outwardly when bending member 16 is in position for bending and has a contacting portion defined by a longitudinally extending plastic strip 31 positioned in a recess 32 recess 32 is generally l shaped and strip 31 includes a short leg 33 having an enlarged end portion 34 for holding strip 31 the other leg of strip 31 extends along recess 32 beyond portion 34 to define a sheet contacting portion strip 31 is preferably made of polyurethane having a durometer of 60 on the a scale the fixed member 13 further includes a recess extending longitudinally at the juncture of the clamping surface 14 and the projections 23 this recess functions as a pocket into which any burrs may fall from a knife used for scoring the workpiece clamping surface 14 is spaced slightly above projections 23 in order to minimize marring of the surface of the workpiece when it is inserted and removed bending member 16 also includes a recess extending longitudinally between projections 27 and contacting portion 31 in use a workpiece of sheet material is clamped against clamping surface 14 and bending member 16 is moved by manually swinging tubular portion 25 upwardly and outwardly bringing strip 31 of the bending member 16 into engagement with the sheet material as the bending member is swung upwardly hinge pin 29 on.