Aluminum M12 x 1.5
A drain bolt with magnet that can catch iron powder mixed in engine oil. Uses neodymium magnet famous for its strong magnetic force. Having stick sensor mounting hole of SP TAKEGAWA thermometer, you can measure temperature with optional compact LCD thermometer.
Since it has holes for wire locks (which corresponds to race regulations), you can use it for race use. 
Made of machined aluminum with anodized finishing. Has laser making of SP TAKEGAWA logo. 
As the magnet is strongly fixed with rivet jointing you do not need to worry about loosening.