Machinists and mechanics, this INSIZE telescoping gage is exactly what you need for those tricky internal measurements! The 1/2 to 3/4 inch range is perfect for checking bore sizes, internal diameters, and all sorts of hard-to-reach spaces. That long handle design is a game-changer - it lets you get into deep holes and recessed areas where regular tools just can't reach. The telescoping mechanism is smooth and locks securely once you've got your measurement. Made with INSIZE's typical precision quality, so you know you're getting accurate readings every time. The package is compact at about 14.37 x 3.35 x 0.39 inches and super lightweight at just 0.19 lbs, so it's easy to store in your toolbox or take to job sites. Perfect for machine shops, automotive work, manufacturing, or any situation where you need reliable internal measurements. The telescoping design means it collapses for storage but extends to take measurements quickly. Much more accurate than trying to eyeball things or use makeshift measuring methods. The build quality feels solid in your hands - not like those cheap tools that wear out quickly. If you work with engines, machinery, or any precision equipment, this is one of those tools you'll wonder how you lived without. Comes from China but meets INSIZE's solid quality standards. Keep your measurements precise and your work professional with this reliable telescoping gage. Your projects will thank you for the accuracy!