DOUBLE ENDED BORING BAR WITH HOLDER (1/4 Inch) Manufactured from selected steel, these boring bars are accurately machined Bars incorporate broached holes that accept standard high speed steel or carbide tool bits conveniently Double ended boring bars and holder comes complete with screws and allen keys Made from Tool Steel black shining finish Boring bars have one end 45° and other 90° Supplied with tool bits and allen keys Manufactured from selected steel, these are ideal for holding standard round boring bars in standard toolholders or tool posts