This is a small magnet clamp for building with 1/16th and 1/8th strip wood and for general holding and blocking applications. Small enough to fit inside smaller structures (photos show clamps in use on a 24 inch MrMulligan tail assembly). 

Kit cut using 1/16 ply and includes parts for 30 magnet holders (you will need 60 magnets). 

Requires a pair of rectangular 6mm x 3 mm x 1 mm magnets for each clamp.

find the magnets here