Drill Bit High Steel Black and Gold Coated 21/32 * 6-1/4 [ 118°, Split Point ] thread_size_m33_3-5 The bolts have a thread

The bolts have a thread of 1/4-20 and a length of 9/16

the inside threads have a thread of 1-1/2-11-1/2

The screws have a thread of 1-1/2-6 and a length of 12

The nuts have a thread of M33 * 3

Drill Bit High Steel Black and Gold Coated 21/32 * 6-1/4 [ 118°, Split Point ] thread_size_m33_3-5 The bolts have a threadThese drill bits have the rigidity and length required for most applications. Black and gold oxide drill bits produce less friction than uncoated drill bits. Use cutting oil to increase the durability of the drill bits. The Split point allows drill without pre drilling. Forests have a length of 6 1 4 and a diameter of 21 32.