Drag Bits

Drag Bits Step Type One Piece 3-way

Bit Size	Pin Type
2-3/4″ – 3-1/2″	4 THD N-ROD
3-5/8″ – 4-3/4″	2-3/8″ API PIN
4-7/8″ – 5-1/8″	2-3/8″ API PIN
5-1/4″ – 5-1/2″	2-3/8″ API PIN
5-5/8″ – 6″	2-3/8″ API PIN
6-1/8″ – 6-1/4″	2-3/8″ API PIN
6-1/2″ – 6-3/4″	2-3/8″ API PIN
5-1/2″ – 6-3/4″	3-1/2″ API PIN
6-7/8″ – 7-7/8″	3-1/2″ API PIN
8″ – 9″	3-1/2″ API PIN
9-1/8″ – 10-7/8″	3-1/2″ API PIN
7-7/8″ – 8-7/8″	4-1/2″ API PIN
9″ – 9-7/8″	4-1/2″ API PIN
10″ – 10-7/8″	4-1/2″ API PIN
11″ – 12-1/4″	3-1/2″ OR 4-1/2″ API PIN

Kelly Bits

Bit Size	Box Connection
3-7/8″	ARCO, 2″ IF
4-3/4″ – 5-1/4″	2-3/8″ MHJR, FA, MR, IF
5-1/2″ – 6-3/4″	2-3/8″ MHJR, FA, MR, IF
6-7/8″ – 7-7/8″	2-3/8″ MHJR, FA, MR, IF
8″ – 10″	2-3/8″ MHJR, FA, MR, IF

H.D. Chevron One-Piece Bits

Bit Size	Pin Type
3/4″ – 2-1/2″	A-ROD, AW
2-5/8″ – 2-7/8″	A-ROD, AW
2-3/4″ – 3-1/4″	3THD/4THD N-ROD, 2″ IF
3-3/8″ – 3-3/4″	3THD/4THD N-ROD, 2″ IF
3-3/4″ – 4-3/4″	2-3/8″ API PIN
4-7/8″ – 5-1/8″	2-3/8″ API PIN
5-1/4″ – 5-1/2″	2-3/8″ API PIN
4-5/8″ – 5″	2-7/8″ API PIN
5-1/8″ – 5-1/2″	2-7/8″ API PIN
5-1/2″ – 6-1/4″	3-1/2″ API PIN
6-1/2″ – 6-3/4″	3-1/2″ API PIN
7″ – 7-1/2″	3-1/2″ API PIN
7-5/8″ – 8″	3-1/2″ API PIN