A saw blade clamping arrangement for a power tool including a drive shaft and a saw blade releasably interconnected with the drive shaft for reciprocating motion along a longitudinal axis. The male termination end having a slot between two beam sections. The grain hulls serve both as an inert bulking additive that reduces the density of the composition and as a sensitizer that reduces the energy needed to reliably detonate the composition. A vacuum generate is utilized to evacuate air from the hood enclosure to assist in lifting the layer of articles.