Wera 05134921001 851/1 A 1/4'' Hex Phillips Insert Bits are high quality bits designed for phillips screws and are designed particulary hard for semi-hard materials. Wera 851/1 A 1/4'' Hex Phillips ® Insert Bits are a profiled version with especially sharp edges which break away the paint when screw profiles are covered in it and this ensures a dependable tranfer of power between the bit and screw.
Wera 851/1 A 1/4'' Hex Phillips ® Insert Bits are aviation bits which means they are hard bits with a sharp-edged profile which penetrates screw profiles full of paint, such as on fuselage panels, ensuring a dependable transer of force between the bit and the screw. Wera 851/1 A 1/4'' Hex Phillips ® Insert Bits are suitable for holders as per DIN ISO 1173-D 6.3.