Note: Please check your specific model / size carefully before purchasing or contact us to confirm. Replacement Blade Drive Assembly For Andis Models: #20658 / 20659 For Supra ZR II Cordless Detachable 79005 DBLC-2 Features: Replacement Blade Drive Assy Fits all compatible Andis clippers All AG AGC AGP AGR BG BGC BGC-2 BDC BGR MBG AGR+ BGR+ AGRC BGRC AGRV BGRV BGCL AGCL DBLC SMC MBG MBG2 Clippers It is the clear plastic frame with a black lever that moves the blade back and forth It should be replaced when blades are no longer cutting sharply .