Superior Parts DBM83-01 is a NR83A / A2 - Driver, Bumper & Magazine Kit which includes SP 877-323 piston driver, SP 878-303 piston bumper & SP 885-827A Aluminum magazine

SP 877-323 Piston Driver: Aluminum is crimped into the unilok grooves of the shaft to prevent unscrewing

Hardened steel lock tite and micro-mechanically locked piston driver interface

to unscrew

SP 878-303 Piston Bumper: Precision machined, virgin high density yellow color plastic framer bumper

SP 885-827A Aluminum Magazine: Fits Hitachi NR8A / A2