Please note, Use of excessive force can damage these tools and/or render the decoding function inoperable.
Each product of Lishi tool has an anti-counterfeiting code. Please query the anti-counterfeiting code to determine that it is a genuine tool.
If the anti-counterfeiting code is used or the product is damaged by individuals, the goods cannot be returned or exchanged.
If you have any questions about quality, shipping or other problems, please contact me first.I will give you a satisfy solution.
About SC1 SC4 KW1 KW5 HU101 R52 SC1- Fits in the SC1 (5 Pin)  commonly found on made by Schlage and several other companies. 
 
SC4- Fits in the SC4 (6 Pin)  commonly found on made by Schlage and several other companies. 

KW1- Fits in the KW (5 Pin)  commonly found on made by Kwikset and several other companies. This will not work in Kwikset version 3 or newer. 

KW5- Fits in the KW (6 Pin) commonly found on made by Kwikset and several other companies.