Item Type: 18V to 20V Battery Adapter Material: ABS Color: As Pictures Shown Weight: Approx. 120g / 4.2oz Product Size: Approx. 11x7x4cm / 4.3x2.8x1.6in Application: Compatible with most styles of 18V to 21V, suitable for woodworking, power tool adapters 1Scope of Application: Battery adapter is compatible with most styles of 18V to 21V, suitable for woodworking, power tool adapters. 2Multiple Protection Functions: There are short circuit protection, over current protection, under voltage protection and low power consumption. 3Premium Material: 18V to 20V battery converter is made of ABS, fine workmanship makes the products durable, not easy to damage. 4Closely Fitting: Closely fit the original machine hole position with accurate shape and size design, hand feelings are still comfortable. 5Good Workmanship: Exquisite workmanship, beautiful appearance design, small portable size, providing you great using experience.1 x BatteryAdapter