ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Cash Equivalents and Concentrations of Credit Risk [Abstract]
Amount of deposits insured by Federal Deposit Insurance Corporation (FDIC)	$ 250,000								$ 250,000
Inventory [Abstract]
LIFO inventory amount	23,922,496								23,922,496
FIFO inventory amount	6,735,116								6,735,116
Excess of current cost over LIFO carrying value	6,689,000				6,302,000				6,689,000	6,302,000
Property, Plant and Equipment [Line Items]
Depreciation									3,592,263	3,210,324	3,155,717
Finite-Lived Intangible Assets [Line Items]
Amortization expense									233,023	229,476	551,499
Amortization expense fiscal year maturity [Abstract]
2014	231,000								231,000
2015	231,000								231,000
2016	231,000								231,000
2017	231,000								231,000
2018	231,000								231,000
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	3,637,181				3,759,555				3,637,181	3,759,555
Accumulated Amortization	2,179,678				2,105,598				2,179,678	2,105,598
Net per Balance Sheet	1,457,503				1,653,957				1,457,503	1,653,957
Weighted-Average Amortization Period									16 years	15 years 9 months 18 days
Goodwill [Roll Forward]
Beginning balance				13,933,599				13,905,209	13,933,599	13,905,209
Foreign exchange									(91,552)	28,390
Ending balance	13,842,047				13,933,599				13,842,047	13,933,599	13,905,209
Product development costs [Abstract]
Product development costs									991,286	814,096	825,778
Advertising costs [Abstract]
Advertising costs									486,027	442,300	386,908
Basic [Abstract]
Weighted average shares outstanding (in shares)	6,221,851	6,221,515	6,220,569	6,219,775	6,219,384	6,219,241	6,217,198	6,213,913	6,220,928	6,216,931	6,178,664
Diluted [Abstract]
Weighted average shares outstanding (in shares)	6,221,851	6,221,515	6,220,569	6,219,775	6,219,384	6,219,241	6,217,198	6,213,913	6,220,928	6,216,931	6,178,664
Dilutive stock options (in shares)									16,830	16,444	37,529
Denominator for diluted earnings per share (in shares)	6,238,089	6,238,074	6,238,025	6,236,842	6,237,709	6,234,727	6,231,335	6,231,739	6,237,758	6,233,375	6,216,193
Anti-dilutive stock options (in shares)									0	0	0
Stock Based Compensation [Abstract]
Share-based compensation expense									0	0	0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)									0	0	0
Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	2,595,931				2,732,307				2,595,931	2,732,307
Accumulated Amortization	1,676,440				1,652,199				1,676,440	1,652,199
Net per Balance Sheet	919,491				1,080,108				919,491	1,080,108
Goodwill [Roll Forward]
Beginning balance				2,099,783				2,071,393	2,099,783	2,071,393
Foreign exchange									(91,552)	28,390
Ending balance	2,008,231				2,099,783				2,008,231	2,099,783
Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	1,041,250				1,021,409				1,041,250	1,021,409
Accumulated Amortization	503,238				447,732				503,238	447,732
Net per Balance Sheet	538,012				573,677				538,012	573,677
Goodwill [Roll Forward]
Beginning balance				11,833,816				11,833,816	11,833,816	11,833,816
Foreign exchange									0	0
Ending balance	11,833,816				11,833,816				11,833,816	11,833,816
Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0				5,839				0	5,839
Accumulated Amortization	0				5,667				0	5,667
Net per Balance Sheet	0				172				0	172
Goodwill [Roll Forward]
Beginning balance				0				0	0	0
Foreign exchange									0	0
Ending balance	$ 0				$ 0				$ 0	$ 0
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets									5 years
Minimum [Member] | Technology and Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets									5 years
Maximum [Member] | Technology and Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets									17 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets									10 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets									39 years 6 months
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets									3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets									10 years
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers									0	0
Threshold percentage of concentration risk (in hundredths)									10.00%	10.00%