Shop-Tek #81401 3-1/8-Inch Retracting Screw Holder (Pack of 2) Retractable Sleeve Guides Screw for a Straight Drive Every Time Magnetized Tip Holds Screw in Position for Accurate Start Allows One Hand Driving - Frees Second Hand for Positioning Work Pieces Prevents Screw Wandering in Tough Wood Grain and Near other Holes Screw Capacity: 3-1/8-Inch Length