Enlarges the mag well opening for faster mag changes; funnels the magazine right into the chute. Machined from lightweight Delrin material that provides a perfect match to the Glock grip frame. Thin profile doesn’t add much bulk or weight; great on carry pistols. Securely held in place with a single screw; requires drilling only one hole in the rear of the grip frame for installation. Mfg: California Comp. Works SPECS: Delrin, black. 2-5/8″ (6.6cm) long, 1-3/8″ (2.5cm) wide. .6 oz. (18g) wt. Small fits Mod. 17, 17L, 19, 22, 23, 24. Large fits 20, 21.