Proven Industries reviews (provenlocks.com): Cant get an order right, then they lie and try to blame you for the problem. Selling junks, bad customer service. China trailer locks. Awesome. Don't be critical of them, they will get very upset. Best Lock and customer service!! Poor and Unreasonable... HUK 3 Piece Tubular Lock Pick Tool Give Away/Review/ How to use/ Difference between Old & New versions/Cobra Puck Lock picked and upgraded w/medeco T Handle Hockey Puck style padlocks can be keyed in with other 10 series products. Locks can be keyed alike, keyed different, or master keyed depending on your specific needs. Shackle-less design for the highest level of protection against bolt cutter attacks. Please allow 6-8 week lead times for all Medeco products; 5 pin, key-in-knob (10 series) cylinder.