MTM Screw It Deluze Bore Guide. Bore guides properly align the cleaning rod and reduce solvent overflow protecting the bore and action of your rifle. Screw-in design creates a tight chamber fit which aligns bore and protects action area. Specifications for MTM SBK Screw It Deluze Bore Guide: Manufacturer: MTM Fabric/Material: Polymer Color: Grey Included Accessories: Compact plastic storage case Package Contents: MTM SBK SCREW IT DELUZE BORE GUIDE MTM SBK SCREW IT DELUZE BORE GUIDE