SVI THUMB SAFETY - AMBIDEXTROUSConfidence at your fingertips. Another Infinity first, these thumb safeties have been designed and fully precision machined from billet to provide you many times the strength and durability found in other safeties on the market. Available in 416 stainless steel or 4140 blued steel and manufactured to the tightest tolerances, these safeties are offered in multiple sizes and paddle widths in keeping with Infinity's commitment to providing you a full