A compact utility knife includes a blade holder slidably connected to a handle. The magnetic filed sensor includes a first sensor element arrangement including at least a first and a second sensor element for sensing the first magnetic field component, which includes a first measurement field component andor a first calibration field component, with respect to a first spatial axis in the reference point. Using this synchronization, the frequency offset choices and timing offset choices can be advantageously bounded within predetermined ranges. Optionally, a copolymerization reaction between an alpha-olefin and \u201cT\u201d reagent takes place initially to incorporate some \u201cT\u201d molecules in the polyolefin main chain, and the incorporated \u201cT\u201d units then behave as chain transfer agents for reacting with the propagating polyolefin chains to form side chains.