It was filled with Trialen 105, a mixture of 15% RDX, 70% TNT and 15% aluminium powder.

A central exploder tube of high grade TNT ran down the center of the explosives to ensure detonation.

At the other end was a base plate, just forward of which the magnesium alloy tail was tack welded onto the body, and also bolted to the tail attachment brace.

Around the nose of the bomb was a kopfring - a metal ring, triangular in cross section, designed to prevent ground penetration or to stop forward momentum when hitting water.

The bomb was attached to the aircraft horizontally by an attachment band and hung from a H-type suspension lug in a bomb bay or mounted on a fuselage hardpoint.