For .177 to .50 Caliber Scope Red Dot Bore Sighter Kit Tools with Rotary Switch
1 x Laser Bore Sighter. -7 bore adjustable adapters to fit all. 177-.50 caliber. Easy to Use! - Length: 165mm, Head Dia: 19mm, Tail Dia: 4.2mm. -Screws already are set in the factory when center aligning.