GUELPH, ONTARIO – April 21, 2004 – First quarter sales, shown net of rebates and discounts,
are up 7.5% compared to the first quarter of 2003. Sales were buoyed by a stronger US economy,
and continued expansion of the Company’s international business. The value of the Canadian to
US dollar exchange rate leveled, and dropped slightly from the 2003 December year-end, but
averaged 14% higher when compared to Q1 2003. Sales to the US reported in Canadian dollars
increased 3.4% over Q1 2003, but increased 17.7% when compared in source US dollars.

Earnings from operations for the quarter are down 14.2% from the comparable quarter in 2003,
largely due to the margin impact of the US exchange rate.

Long-term debt was reduced $56,000 in the quarter. The balance sheet remains strong, net book
value per share ending the quarter at $1.84.

Hammond Manufacturing Company Limited manufactures a broad range of products for the
electronic and electrical products industry, including metallic and non-metallic enclosures, racks,
small cases, outlet strips, surge suppressors and electronic transformers.

Robert F. Hammond, Chairman and CEO
Tel: (519) 822.2960
Fax: (519) 822.8987
Email: ir@hammfg.com