Bernstein tric slotted screw holders bernstein 4 407 this 110 x 4mm tric screw holder from bernstein is suitable for inserting slotted screws into awkward or hard to access places simply push the lever and insert blade into the slot and release lever the screw is retained tightly in position and can then be inserted securely into the hole bernstein 4 407 retaining screwdriver slotted 110 x 4mm