/ Precision Measuring Tools / Precision Hand Tools / Indicators & Gages / Holders / 657P * Not actual product image 657P Magnetic Base Only 52757 657 Magnetic Bases and Holders Magnetic Base Only, 1-15/16" x 1-5/8" x 1-7/8" (50 x 40 x 48mm) deep. Push button on/off switch for one-hand operation The Starrett 657 Set Including Magnetic Base, Upright Post Assembly and AGD Dial Indicator has three precision ground, magnetic contact surfaces. Grips horizontally, vertically or upside down. V-step holds base to round surfaces. Extra #1/4-20 tapped hole in one side of base (not shown) for mounting post. Available with or without Starrett AGD Dial Indicators: inch reading 25-131J (graduation .0005", dial reading 0-25-0, range .125") or millimeter reading 25-181J (graduation 0.01mm, dial reading 0-50-0, range 2.5mm). Other indicators can be furnished on request. Magnetic Base. Features Specifications 3D CAD Files / Exploded Parts Diagram Product Testimonials California Prop 65 Other similar products 3657U Flex-O Post Only with Locking Lever and Snug 657-1 Magnetic Base Universal Indicator Holder with triple jointed arm and fi ne adjustment 657-2 Magnetic Base Universal Indicator Holder 657-3 Magnetic Base Universal Indicator Holder - Arm Assembly Only 657-650Z Magnetic Base Indicator Holder Set - Base and Post Assembly with 650B1 Indicator, 657S Snug, and 3 Contact Points 657-709Z Magnetic Indicator Holder Set - Base and Post Assembly with 709AZ Indicator and PT22428 Swivel Post Snug 657-811Z Magnetic Indicator Holder Set - Base and Post Assembly with 811-1Z Indicator and PT22428 Swivel Post Snug 657A Magnetic Base with Swivel Post Assembly 657AA Magnetic Base Indicator Holder - Complete Set 657B Magnetic Base and Post Assembly with 711FSAZ Last Word Indicator and PT07101F Body Clamp 657BZ Magnetic Base and Post Assembly with 711FSAZ Last Word Indicator, PT07101F Body Clamp and Wood case 657C Magnetic Base and Post Assembly with 196B1 Indicator, PT18718 Snug, 3 Contact Points, and Contact Point Adaptor 657CZ Magnetic Base and Post Assembly with 196B1 Indicator, PT18718 Snug, 3 Contact Points, Contact Point Adaptor and Wood Case 657D Magnetic Indicator Holder - Magnetic Base, Upright Post Assembly Including Post, Swivel Post Snug and Gage Holding Rod 657E Set Including Magnetic Base, Upright Post Assembly and 25-131J Dial Indicator 657EZ Set Including Magnetic Base, Upright Post Assembly, 25-131J Dial Indicator and Case 657F Magnetic Base Indicator Holder - Individual Components 657G Magnetic Base Indicator Holder - Individual Component 657H Swivel Post Snug Only 657MB Magnetic Indicator Holder Set 657MBZ Magnetic Base and Post Assembly with 711MFSZ Indicator, PT07101F Body Clamp and Wood Case 657MC Magnetic Indicator Holder Set 657MCZ Magnetic Indicator Holder Set 657ME Set Including Magnetic Base, Upright Post Assembly and AGD Dial Indicator 657MEZ Set Including Magnetic Base and Upright Post Assembly with Millimeter Reading Indicator 25-181J 657P Magnetic Base Only 657S Snug with Two 1/4" (6.3 mm) Holes 657T Flex-O-Post Indicator Holder - Magnetic Base with Flex-O-Post Assembly 657TW Flex-O-Post Indicator Holder - Magnetic Base with Flex-O-Post Assembly and Fine-Adjustment Attachment 657W Fine-Adjustment Attachment 657X Gage Rod - 1/4" (6.3mm) x 6" (150mm) 657Y Indicator Attachment PT06784-A Gage Holding Rod with Clamp Mechanism PT17850 Flex-O-Post Indicator Holder PT18318 Threaded Adaptor, for Using 657 Magnetic Base Attachments with the 659 Series Magnetic Base Contact Starrett Features 1-15/16" x 1-5/8" x 1-7/8" (50 x 40 x 48mm) deep Push button on/off switch for one-hand operation Specifications Made in America: Yes 3D CAD Files / Exploded Parts Diagram Login to see related product files. Or create an account. Product Testimonials Write a product review John S. (6/29/2020) Rock solid magnet. This is it, nothing compares for quick set-up and accurate results. After all, it's made in America by Starrett Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements. California Proposition 65 Warning WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov