Bolt Technology Corporation Four Duke Place Norwalk, CT 06854

EXHIBIT 10.9

Bolt Technology Corporation

Four Xxxx Xxxxx

Xxxxxxx, XX 00000

February 11, 2005

Xx. Xxxxxx X. Xxxxxxx, Xx.

Xxxx Xxxxxx Xxx 000

Xxxxxxxxx, Xxxxx 00000

Dear Al:

As we have discussed, Bolt Technology Corporation has decided to exercise the Option to Purchase as set forth in Paragraph 16.1 of the Lease Agreement dated April 20, 1999, by and between Xxxxxx X. Xxxxxxx and Xxxxxxxx X. Xxxxxxx and Bolt Technology Corporation.

I am forwarding a copy of this letter to Xx Xxxxxx and Xxxxxxx Xxxxx so they can proceed to prepare the required documentation for the purchase.

Sincerely yours,

/s/ Xxxxxxx X. Xxxx                

Xxxxxxx X. Xxxx, President

Bolt Technology Corporation

CC: Xxxxxx X. Xxxxxx, Esq.

Xxxxxxx X. Xxxxx, Esq.