Sargent & Greenleaf 8410 Group 1 Mechanical Safe Lock
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The 8400 Series is the direct descendant of the original MP Manipulation Proof combination lock. 8410 models are Underwriters Laboratories Listed Group 1. Tested and verified by Underwriters Laboratories to resist 20 man-hours of expert manipulation. Three combination wheels (made of brass and aluminum or acetal resin) offer 1,000,000 theoretical unique combinations. Designed and constructed to perform in the most demanding applications. Internal relock trigger secures the lock in the event of a punch attack. Using a Centi-Spline dial, the lock can be mounted right-hand, left-hand, vertical-up, or vertical-down.