Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	$ 41,559,589	$ 35,520,182	$ 82,055,483	$ 68,708,794
Operating Profit	4,144,234	2,298,916	7,313,648	4,017,972
Interest expense	(98,667)	(53,040)	(187,904)	(120,043)
Other income	4,587	3,071	10,723	9,516
Income before income taxes	4,050,154	2,248,947	7,136,467	3,907,445
Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	17,746,959	14,865,806	36,954,659	29,466,082
Operating Profit	2,125,226	1,050,796	4,089,783	1,984,681
Security Products [Member]
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	13,981,220	12,974,240	26,096,043	24,593,978
Operating Profit	1,547,636	1,083,151	2,343,204	1,639,029
Metal Products [Member]
Segment Reporting Information [Line Items]
Revenues, sales to unaffiliated customers	9,831,410	7,680,136	19,004,781	14,648,734
Operating Profit	$ 471,372	$ 164,969	$ 880,661	$ 394,262