846/8 3-flute Countersink Bits Set, 8 pieces 1x 816 R Bitholding screwdriver with Rapidaptor quick-release chuck: 1/4", x 119 mm 1x 888/4/1 K Rapidaptor Universal Bit Holder: 1/4", x 50 mm 6x 846 3-flute Countersink Bit: 6.30x31 mm, 8.30x31 mm, 10.40x34 mm, 12.40x35 mm, 16.50x40 mm, 20.50x41 mm8-piece countersink bit set in a stable plastic box for deburring, chamfering and countersinking. The finely-tuned material elasticity provides for great durability. Perfect chip removal and a low tilt risk ensure pleasant working. Cutting section as per DIN 335-C, 90° with 3 cutters. High quality, ergonomic bit holder equipped with a magnet. The Rapidaptor quick-release chuck ensures rapid bit change without any extra tools. hexagon, suitable for holders with take-up as per DIN ISO 1173-D 6.3.