This hinged Stop Collar has an internal groove and these are available in 4 1/2 " to 20 " sizes+ any sizes in which a spiral locking pin is inserted. This tightens the collar to the casing firmly.

It can be latched on the casing pipe without having to be slipped on.

This cementing product is easy to install and most effective where annual low clearance received. The stop collars are coated with to polyester powder which prevents it from getting rust.

These are available in 4 1/2" to 20 "sizes + any special sizes

Source :- https://www.sledgehammerasia.com/stop-collars/stop-collar.html

Sledgehammer Oil Tools Pvt. Ltd

SledgeHammer is one of the leading centralizer manufacturers and API & ISO certified 14001, 18001 and, 9001 certified company known for its quality cementing products. Presently, it enjoys the reputation for being the largest manufacturer of cementing products and suppliers of offshore and onshore cementing and float apparatus in the entire Asia. This makes it the only source for quality and original equipment.SledgeHammer is a pioneer in production and designing of innovative cementing products.SledgeHammer is a manufacturer of Quality Cementing Tool, Bow Spring Centralizer, Solid Rigid Centralizers, Cement Basket, Cementing Plug, Cementing Head, Stop Collars, Float Equipments, Stage Cementing Tool, Bridge/Cement Retainer, Dopes & Compounds.