Along with Many other options,I Like the BlastMatch.You can Alway's use your teeth to manipulate the cover,If they are Available in an Emergency!Thank You for a Thorough review of this Product,The Innards of this device,didn't really Surprise me as,I had thought it to be"Very minimal",Yet that spring inside looks to be Kinda' lacking for an Otherwise fairly Beefy chunk of Ferro-rod! Thanx Again for The Info!5-*****!