Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	$ 39,644,050	$ 36,089,946	$ 121,699,533	$ 104,798,740
Operating Profit	3,334,522	2,127,106	10,648,170	6,145,078
Interest expense	(93,238)	(53,643)	(281,142)	(173,686)
Other income	3,462	8,012	14,185	17,528
Income before income taxes	3,244,746	2,081,475	10,381,213	5,988,920
Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	18,656,171	17,150,236	55,610,830	46,616,318
Operating Profit	2,048,559	1,093,102	6,138,342	3,077,782
Security Products [Member]
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	12,593,633	12,431,267	38,689,676	37,025,245
Operating Profit	1,145,886	1,037,122	3,489,090	2,676,151
Metal Products [Member]
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	8,394,246	6,508,443	27,399,027	21,157,177
Operating Profit	$ 140,077	$ (3,118)	$ 1,020,738	$ 391,145