The Ulti-Mate® range of Woodscrews are high-performance screws ideal for tradesmen and DIY’ers alike. A high-quality Stick-Fit® driver bit is included in every single box of Ulti-Mate® screws. Once the screw is engaged to the driver bit, the patented PSD® recess gives a Stick-Fit® connection that enables the screws to remain attached to the bit.