Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average period before the next renewal or extension (both explicit and implicit) for intangible assets that have been renewed or extended, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Intangibles (Details) (USD $)			3 Months Ended								3 Months Ended
Intangibles (Details) (USD $)	Mar. 30, 2013	Dec. 29, 2012	Mar. 30, 2013 Patents and developed technology [Member]	Mar. 31, 2012 Patents and developed technology [Member]	Mar. 30, 2013 Patents and developed technology [Member] Industrial Hardware Segment [Member]	Mar. 31, 2012 Patents and developed technology [Member] Industrial Hardware Segment [Member]	Mar. 30, 2013 Patents and developed technology [Member] Security Products Segment [Member]	Mar. 31, 2012 Patents and developed technology [Member] Security Products Segment [Member]	Mar. 30, 2013 Patents and developed technology [Member] Metal Products Segment [Member]	Mar. 31, 2012 Patents and developed technology [Member] Metal Products Segment [Member]	Mar. 30, 2013 Technology and licenses [Member] Minimum [Member]	Mar. 30, 2013 Technology and licenses [Member] Maximum [Member]	Mar. 30, 2013 Customer relationships [Member]	Mar. 30, 2013 Non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets											5 years	17 years	5 years	5 years
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount			$ 3,764,038	$ 3,759,555	$ 2,721,179	$ 2,732,307	$ 1,037,020	$ 1,021,409	$ 5,839	$ 5,839
Accumulated Amortization			2,127,260	2,105,598	1,656,781	1,652,199	464,726	447,732	5,753	5,667
Net as per Balance Sheet	$ 1,636,778	$ 1,653,957	$ 1,636,778	$ 1,653,957	$ 1,064,398	$ 1,080,108	$ 572,294	$ 573,677	$ 86	$ 172
Weighted Average Amortization Period			15 years 8 months 12 days	15 years 9 months 18 days