Brownells Bolt Heat Sink Set Steel Blued 5-Piece

Provides protection to locking lugs when welding or forging bolt handles by pulling heat away from these critical areas and dissipating it. Especially effective when used with Heat Control Paste. Threaded to fit securely into rear of bolt body, giving additional protection to interior threads by preventing scale formation. Flats milled on end allow use of wrench. Available separately or as a Set of five. Mfg: Brownells SPECS: Steel, blued. 4A 1/4" (10.8cm) to 5A 1/2" (14cm) long depending on the model. #1 - 1903 & 03A3 Springfields, #3 - 98 Mauser, #4 - Remington 700.