This handle SPS is made of very durable polymer and carrying an oversized anodized aluminum high quality for faster refill funnel. The metal inserts are longer making it stronger and more durable. The handle is supplied with the mainspring housing. They suit the type 2011 Standard Division pistols for adjusting perfectly to the IPSC box. The texture is perfect to prevent slippage providing better empuñamiento in wet conditions. Installation is very simple but you need a little adjustment.