Durable machined G10 fiberglass grips are almost impervious to solvents, moisture, and expansion/contraction due to temperature extremes. Five, deep, vertical grooves in each panel and fine-line diagonal texturing help you retain a solid grip on the pistol but won't snag like traditional checkering. Still allows a quick shift of grip for reloads, and also easier on clothes and your skin during carry. The "TS" grips feature a thumb scoop on the left hand panel that allows better access to the magazine catch. For shooters with short digits, this thumb scoop will make your magazine changes more certain. The HD-300-TS Carry Groove grips feature a beveled bottom. The HD Mfg: Harrison Design & Consulting SPECS: G10 fiberglass laminate, matte black. .275" (7mm) thick. Full-Size fits Government Model and Commander. Compact fits Officers Model.