Мaterial:

Wide variety of sizes

Strong fastening connection

Wide variety of applications

Ability to place countersunk

Best price

Grip range and hole size

Size	Grip range	Head diameter	Hole size
3.2 x 6	1.5 ~ 3.5	6.0	3.3 ~ 3.4
3.2 x 8	3.5 ~ 5.0
3.2 x 10	5.0 ~ 7.0
3.2 x 12	7.0 ~ 9.0
3.2 x 14	9.0 ~ 10.5
3.2 x 16	10.5 ~ 13.0
4.0 x 6	1.5 ~ 3.0	7,5	4.1 ~ 4.2
4.0 x 8	3.0 ~ 5.0
4.0 x 10	5.0 ~ 6.5
4.0 x 12	6.5 ~ 8.5
4.0 x 14	8.5 ~ 10.5
4.0 x 16	10.5 ~ 12.5
4.8 x 6	1.5 ~ 3.5	9.0	4.9 ~ 5.0
4.8 x 8	2.0 ~ 4.5
4.8 x 10	4.5 ~ 6.0
4.8 ~ 12	6.0 ~ 8.0
4.8 x 14	8.0 ~ 10.0
4.8 x 16	10.0 ~ 12.0