REPORTABLE SEGMENTS (Details) - USD ($)	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017
Reportable Segments Information [Abstract]
Sales	$ 234,275,463	$ 204,239,613
Income before income taxes	17,590,329	11,454,942
Operating profit	17,859,341	12,082,758
Interest expense	(1,202,272)	(976,512)
Other income	933,260	348,696
Assets	181,247,567	176,458,397
Depreciation and amortization	5,329,208	4,719,185
Capital expenditures before currency translation adjustment	5,413,073	2,756,709
Currency translation adjustment	(9,014)	6,240
Capital expenditures	5,410,545	2,762,949
Operating Segments [Member]
Reportable Segments Information [Abstract]
Assets	122,103,898	116,679,690
Operating Segments [Member] \| Industrial Hardware [Member]
Reportable Segments Information [Abstract]
Sales	140,293,409	115,273,233
Income before income taxes	9,588,185	5,042,687
Assets	47,600,805	44,828,458
Depreciation and amortization	2,978,324	2,526,460
Capital expenditures before currency translation adjustment	3,029,406	1,151,868
Operating Segments [Member] \| Security Products [Member]
Reportable Segments Information [Abstract]
Sales	64,897,871	60,976,998
Income before income taxes	7,122,640	6,020,847
Assets	54,593,837	53,724,837
Depreciation and amortization	1,135,811	964,873
Capital expenditures before currency translation adjustment	1,482,267	705,178
Operating Segments [Member] \| Metal Products [Member]
Reportable Segments Information [Abstract]
Sales	29,084,183	27,989,382
Income before income taxes	1,148,516	1,019,224
Assets	19,909,256	18,126,395
Depreciation and amortization	1,215,073	1,227,852
Capital expenditures before currency translation adjustment	901,400	899,663
Intersegment Eliminations [Member]
Reportable Segments Information [Abstract]
Sales	3,745,497	3,481,764
Intersegment Eliminations [Member] \| Industrial Hardware [Member]
Reportable Segments Information [Abstract]
Sales	366,381	524,536
Intersegment Eliminations [Member] \| Security Products [Member]
Reportable Segments Information [Abstract]
Sales	3,365,695	2,935,797
Intersegment Eliminations [Member] \| Metal Products [Member]
Reportable Segments Information [Abstract]
Sales	13,421	21,431
General Corporate [Member]
Reportable Segments Information [Abstract]
Assets	59,143,669	59,778,707
Capital expenditures	6,486	0
Reportable Geographical Components [Member]
Reportable Segments Information [Abstract]
Sales	234,275,463	204,239,613
Reportable Geographical Components [Member] \| United States [Member]
Reportable Segments Information [Abstract]
Sales	207,789,058	178,124,818
Assets	166,665,767	153,712,643
Reportable Geographical Components [Member] \| Foreign [Member]
Reportable Segments Information [Abstract]
Sales	26,486,405	26,114,795
Assets	$ 14,581,800	$ 22,745,754

Total capital expenditures from operations and corporate, adjusted for currency translation adjustment.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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