GRIP Hardware Rigging Adapters Concave Plate with Baby Pin Watch this product and we will notify you once it is back in stock. The product is now watched We will notify you once the product is back in stock again. E-mail Watch this product Your personal information is processed in accordance with our privacy policy. Concave Plate with Baby Pin Concave Plate with Baby PinUsed to mount a light around a telephone pole or tree. This fitting terminates in a 3" long baby (5/8") pin.