For pricechoose optionsSelect Option 1/4in BS3 1/8in BS1 3/16in BS2 5/16in BS4 7/16in BS Quantity Add to Basket Dormer A225 HSS Centre Drill (BS 328) for drilling components that require machining between centres. Has a 120° point angle with a 60° included countersink. Suitable for both hand and machine use.