Astronia via Amazon offers the Astronia Safety Baby Magnetic Cabinet Locks for $9.99. Coupon code "8844DDSE" drops it to $5.99. Plus, Prime members bag free shipping. That's $24 off list and the lowest price we could find, although we saw it for $2 less a year ago. The set provides a removable knob that works on all locked drawers, four locks, and no-tool installation.