http://www.saflok.com/
These are interesting. much smaller and requires less equipment than tesa.
But just like TESA there good unless you got the drilling instructions

ok these are the specific locks i'll be talking about
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http://www.saflok.com/pages/index.asp?action=product&id=132&sn=*nw?yp$mhA*uysx ?wmhirez*uysx?*kx?*px?pm*kx?*px?e$lvijA*uysx?3teki w3mrhi|2ewtCegxmsrAwyfcjvsrx*eqt?gletxivAkszivrqir x*uysx?*kx?Jvsrx$Hiwo3*px?fv$3*kx?Sjjmgi$W}wxiqw*p x?3e*kx?*px?3pm*kx?*px?pm*kx?*px?e$lvijA*uysx?3tek iw3mrhi|2ewtCegxmsrAwyfcpsgow*eqt?gletxivAkszivrqi rx*uysx?*kx?Psgow*px?3e*kx?*px?3pm*kx?*px?pm*kx?*p x?e$lvijA*uysx?3tekiw3mrhi|2ewtCegxmsrAwyfcwejiw*e qt?gletxivAkszivrqirx*uysx?*kx?Wejiw*px?3e*kx?*px? 3pm*kx?*px?pm*kx?*px?e$lvijA*uysx?3tekiw3mrhi|2ewt CegxmsrAwyfcstxmsrep*eqt?gletxivAkszivrqirx*uysx?* kx?Stxmsrep*px?fv$3*kx?Iuymtqirx*px?3e*kx?*px?3pm* kx?*px?3yp*kx?
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That doesnt look right ^?