1 pcs 2-5mm Countersink Chamfer Tool. 1 pcs 5-10mm Countersink Chamfer Tool. 1 pcs 10-15 mm Countersink Chamfer Tool. 1 pcs 15-20mm Countersink Chamfer Tool. 1 Set 4pcs Deburring Tool Set ：. This bits should use the bench drill, it is easy to shake and it will affect the chamfering effect if you use the hand drill.
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