Item Type: 18V Battery Holder_x000D_ Material: ABS_x000D_ Screw Hole Diameter: Approx. 5mm / 0.2in_x000D_ Adaptation: 18V for Ryobi battery 1WEAR RESISTANT ABS: Battery holder is made of excellent tough ABS material, strong, wear resistant and durable 2EASY INSTALLATION: One piece molding without burr, possess smooth surface, 5mm fixed screw hole, smooth installation, easy to use 3SAFE AND FIRM: Perfectly suitable for the base of for Ryobi power tools, will not fall off and shake during use, safe and reliable 42PCS IN TOTAL: The package contain a total of 2pcs, enough for you to replace and use, very convenient 5STABLE AND DURABLE: 18V battery holder come with stable structure, excellent performance and long service life2 x 18V Battery Holder