Specification:
Boring head size: 3"
Connecting screw thread: 1-1/2"-18
Screw thread: 7/16-20UNF
Cross hole dia: 3/4"
Maximum offset: 1"
Minimum graduation: 0.0005 inch
Dimensions of the 12pcs boring bars:
Length: 3-1/8 inch Bore Depth: 1-1/8 inch Minimum Bore: 7/16 inch
Length: 3-11/16 inch Bore Depth: 1-11/16 inch Minimum Bore: 7/16 inch
Length: 4-1/4 inch Bore Depth: 2-1/4 inch Minimum Bore: 7/16 inch
Length: 3-1/2 inch Bore Depth: 1-1/2 inch Minimum Bore: 9/16 inch
Length: 4-1/4 inch Bore Depth:2-1/4 inch Minimum Bore: 9/16 inch
Length: 5 inch Bore Depth: 3 inch Minimum Bore: 9/16 inch
Length: 3-7/8 inch Bore Depth: 1-7/8 inch Minimum Bore: 11/16 inch
Length: 4-13/16 inch Bore Depth: 2-13/16 inch Minimum Bore: 11/16 inch
Length: 5-3/4 inch Bore Depth: 3-3/4 inch Minimum Bore: 11/16 inch
Length: 4-1/4 inch Bore Depth: 2-1/4 inch Minimum Bore: 13/16 inch
Length: 5-3/8 inch Bore Depth: 3-3/8 inch Minimum Bore: 13/16 inch
Length: 6-1/2 inch Bore Depth: 4-1/2 inch Minimum Bore: 13/16 inch

Features:
1. The boring head group is made of durable materials. It is hardened and more durable.
2. The dial of boring head has clear scale, high precision, strong versatility, accurate cutting and high efficiency.

Package Includes:
1 x 3" boring head
1 x R8 shank
12 x boring bar
3 x hex wrench