Wera 8 Piece Countersind Bit set includes Kraftform bit holding screwdriver, Rapidaptor Universal bit holder and 1/4” hex drive countersink bits designed Bit-Safe with magnetic quick-release bit holder is designed as the comprehensive bit and holder sets for manual or power use. Rapidaptor bit holder with quick-release chuck allows for quick one-handed bit exchange both insert and power bits. Magnetic bit holder is designed for easier application of the screw. All Wera hand tools feature the trademarked ergonomic Kraftform handle, with hard and soft zones, that fits the shape to the hand for the ultimate in comfort and high-speed torque transfer. Sorted by drive and size, tools are easy to locate and return to proper position, making missing products easy to identify. Laser etched marking on bit allows for easy drive tip identification. 846/8 Countersink Bit set includes Kraftform bitholding screwdriver, Rapidaptor Universal bit holder with quick-release chuck and 7 Countersink bit - 6.3x31, 8.3x31, 10.4x34, 12.4x35, 16.5x40, 20.5x41. Includes durable plastic carrying case for transport and storage. Wera – The Best Tools For The Job!