The GTE Tools MasterBead, a handheld, silicone/adhesive dispensing gun, is designed specifically for aluminum-type adhesive tubes. The MasterBead gun is made from ultra-durable polymers and 99 percent of the adhesive material can dispensed in a consistent and uniform bead every time to eliminate mess and waste. The tool's automatic loading feature allows it to continue dispensing material with no need to reset or re-clamp the tube, while enabling single-handed operation. MasterBead is designed to accommodate up to 4-oz, aluminum-style adhesive tubes and comes with a lifetime warranty.