Almore's Clip-On Loupes uses stainless steel screws, instead of a molded plastic friction fit, to mount lenses to the lens armature. This provides a more secure and durable fit. Wire Clip-On Loupes attach to aviator or goggle style glasses and prescription eyewear. The loupes are inexpensive and ideal for use with air abrasion systems. The +5 loupes have 2.25X magnification and approximate working distance 7 inches to 12 inches.