Zinc alloy;
Keyed alike;
Lock body length 1 1/8"
2 keys per lock;
2 Blade style terminals;
Off-On, Two key removal at 12:00(off) and 3:00(on);
Fits in 19mm x 17mm mounting hole; Hex Nut mount
Diameter of the lock cylinder: 3/4" (Detail in attached drawing)
Specification
Current Rating: 4A/125VAC, 2A/250VAC
Contact Resistance: 10 Mill-Ohms Min
Insulation Resistance: 500 Meg- Ohms Min
Dielectric Strength: 1500VAC-1 Minute
Please contact us if you need more or less keys
Below is the link for locks with black key cover:
http://www.ebay.com/itm/LOT-OF-200-Electronic-Key-Switch-Lock-Off-On-Lock-Switch-tubular-KEYED-A-2304-2-/182093265546