Best Suitable materials : Carbon Steel，Alloy Steel

could also suitable for below materials:
1. Cast Iron,Aluminum,Copper,bronze
2. Stainless steel, Titanium,Mild steel

Features:

1. Good combination between chip flow at drill protion and that at countersink portion,which can fully accommodate chips and work well to eject the chips
2. Owing to good chip ejection, such troubles become less as the tool break due to chip clogging

ITEM NO.	Flute Dia./mm	Shank Dia./mm	Flute Length/mm	OAL/mm
D3101010036	1	4	1.5	36
D3101015037	1.5	4	2	37
D3101020040	2	5	2.4	40
D3101025045	2.5	6	3	45
D3101030050	3	8	4	50
D3101035050	3.5	8	4	50
D3101040057	4	10	5	57
D3101050062	5	12	6	62
D3101060066	6	14	7	66
D3101010100	1	4	1.5	100
D3101015100	1.5	4	2	100
D3101020100	2	5	2.5	100
D3101025100	2.5	6	3	100
D3101030100	3	8	4	100
D3101040100	4	10	5	100
D3101050100	5	12	6	100