These BHSpringSolutions LLC Masters Grips are designed with our tactical thumb-positioning-contour on each side of the grip panel. This helps for the fast and accurate holster acquisition and maximizes handling, comfort, and control. These grips are prudced from selcted walnut wood finished with 3 layers of shellac. The feel in the hand is extremely comforable and warm. Extended magazine base available as an add-on to the grips. It will give you more stable position during shooting and better control over the recoil. Production time for each pair is 6 to 8 weeks.