Dowel -Aluminum ring stop collar, drill shaft depth stop with handle 30mm Highlights generic brand Aluminum ring stop collar, drill shaft depth stop with handle 30mm Description: Used as a shaft collar on machines or any type of bit Helping you quickly and easily drill holes to the exact depth Ideal for production work and repeat drilling by positively locking along the bit. QUALITY: Made of premium aluminum, polished, high quality, durable Fine workmanship, high precision Specification: Inner Hole Diameter: Approx. 0.59, 0.47 inch Thickness: Approx 18mm / 0.71 inch Overall Size #1: Approx 73 x 60 / 2.87 x 2.36 inch Overall Size #2: Approx 75 x 60 / 2.95 x 2.36 inch #3 Overall Size: Approx. 95x70 / 3.74x2.76 inch #4 Overall Size: Approx. 73 x 50 / 2.87 x 1.97 inch #5 Overall Size: Approx. 73 x 50 / 2.87 x 1, 97 inch Overall Size #6: Approx 73 x 50 / 2.87 x 1.97 inch Thread Hole: M5 Material: aluminum Color: silver Package includes: 1 piece stop collar