25 Pcs. Titanium Universal Flat Surface House Key Blanks 5 Colors KW1 Kwikset. 25 Key Blanks. Keys duplicate with #66 KW1 Kwikset house keys. The universal flat surface allows these keys to be laser etched, engraved or used with compatible size sticker types to make customized and personalized house keys. Light weight oversized key head. 32 x 32 mm. (1 1/4 x 1 1/4"). Inside stamp square is 1 x 1". 25 pcs. - 5 ea. RED, BLUE, TEAL, GREEN, PURPLE.