Proskit 30 Piece Deluxe Hobby Knife Kit Three Soft Easy-To-Grip Rubber Handles Included 30 Piece Deluxe Hobby Knife Kit. This kit contains everything needed for precision work or fine adjustment work. Three handles included: One basic round handle for fast turning and two convex shaped handles for increased hand-torque. Handles made of a soft, easy-to grip rubber for comfort.