Kool Stop Eagle 2 threadless canti-post brakes - ie/ Dia-Compe AD-990. Made in USA. 

The Eagle 2 is a revolutionary pad that first utilized the hardened reinforced steel internal backbone. This larger pad has been used in all areas of cycling and is a good choice when frame, wheel and fork design allow.

Hardened and Plated reinforced steel backbone

Patented Angled tip plow

Water grooves Pad-Lock™ washer system

Threadless posts for use with Cantilever style brake calipers