CRL L-Squares are factory adjusted to be square. If the L-Square somehow gets out of adjustment, it should be sent back to CRL Los Angeles for proper adjustment. The Allen Screws are tightened very securely during manufacturing and cannot be loosened by the user without a high chance of stripping out these screws. Please contact CRL Product Management
with questions regarding this notice. All CRL Squares and Rules are checked to be within +/- 1/16". They should always be stored in a flat position, not leaning against a wall, to prevent distortion. You only have 30 days from date of shipment to notify CRL of any manufacturing defects to qualify for any warranty replacement or credit.