The author met with a Schlage representative and conducted independent research (including observing the product at a local retail store).
Onye edemede ahụ zutere onye nnọchianya Schlage ma duzie nchọpụta onwe ya (gụnyere ịchọta ngwaahịa ahụ na ụlọ ahịa ịzụ ahịa mpaghara).