SpearTool is a timeless product, and unlike old rubber, delivers consistent performance every time.

For this one off purchase you get:

  • SpearTool spreadsheet calculator
  • A supporting document/operation manual to explain each input, and correct use.


Internet connection for initial download.

Microsoft Excel 2003 or later installed on a PC. SpearTool is not suitable for viewing through a web brower spreadsheet package.

If intending to model an existing design, vernier callipers are strongly recommended in order to take accurate measurements.

Upon selecting the buy now option you are agreeing to the terms and conditions at the bottom of this page.

You can expect to receive SpearTool within the same working day once payment has been made.

Price £35.00

To make this purchase please email admin@speartool.com for secure payment options.

Terms and Conditions


This website is operated by SpearTool. SpearTool offers this website, including all information, tools and services available from this site to you, the user, conditioned upon your acceptance of all terms, conditions, policies and notices stated here.

You agree not to reproduce, duplicate, copy, sell, resell or exploit any portion of the Service, use of the Service, or access to the Service or any contact on the website through which the service is provided, without express written permission by us.

No returns or refunds are available except in exceptional circumstances.


Prices for our products are subject to change without notice.

We reserve the right at any time to modify or discontinue the Service without notice at any time.

We shall not be liable to you or to any third-party for any modification of the Service.


We do not warrant that the results that may be obtained from the use of the service will be accurate or reliable. You expressly agree that your use of, or inability to use, the service is at your sole risk. The service and all products and services delivered to you through the service are (except as expressly stated by us) provided 'as is' and 'as available' for your use, without any representation, warranties or conditions of any kind, either express or implied, including all implied warranties or conditions of merchantability, merchantable quality, fitness for a particular purpose, durability, title, and non-infringement.


These Terms of Service and any separate agreements whereby we provide you Services shall be governed by and construed in accordance with the laws of the United Kingdom.

Email:  admin@speartool.com

Copyright © 2019 SpearTool. All Rights Reserved.