When I build prototypes for LT to take new models on safari he and his guides test them very very hard. The last thing I want is the guy who signs my checks to cut off his fingers. So I add a pin hole on these test pieces, when the blade is open insert pin. On the AD-10 I added the pin hole but for looks only, I'm not sure it there is a pin that even fits the hole size, the safari folders use standard .187" pin.