Eliminate a factor of inaccuracy with the Wheeler Rifle Variant Receiver Lapping Tool. A perfect fit of the receiver to the barrel is vital when it comes to accuracy. This steel-constructed tool along with the provided 220 grit lapping compound will make lapping quick and easy to ensure a perfectly square and true surface to help you achieve an accurate high performing firearm. – Compatible with battery-powered or electric drill – Steel construction with a black oxide finish – Includes: Flex driver shaft 220 Grit lapping compound steel lapping bar